--- product_id: 257233452 title: "Bluetooth Voice Amplifier Speaker Waterproof, Microphone Amplifier Wireless Portable Megaphone Loudspeaker 18W Output for Outdoor, Teachers, Coaches, Elderly, Tour Guide, Presentation and More (Black)" brand: "responsebridge" price: "Bs.3206" currency: BOB in_stock: true category: "Response Bridge" url: https://www.desertcart.bo/products/257233452-bluetooth-voice-amplifier-speaker-waterproof-microphone-amplifier-wireless-portable-megaphone store_origin: BO region: Bolivia --- # 18W crystal-clear output 12 hrs battery life IPX5 waterproof design Bluetooth Voice Amplifier Speaker Waterproof, Microphone Amplifier Wireless Portable Megaphone Loudspeaker 18W Output for Outdoor, Teachers, Coaches, Elderly, Tour Guide, Presentation and More (Black) **Brand:** responsebridge **Price:** Bs.3206 **Availability:** ✅ In Stock ## Summary > 🎤 Amplify your presence, rain or shine! ## Quick Answers - **What is this?** Bluetooth Voice Amplifier Speaker Waterproof, Microphone Amplifier Wireless Portable Megaphone Loudspeaker 18W Output for Outdoor, Teachers, Coaches, Elderly, Tour Guide, Presentation and More (Black) by responsebridge - **How much does it cost?** Bs.3206 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.bo](https://www.desertcart.bo/products/257233452-bluetooth-voice-amplifier-speaker-waterproof-microphone-amplifier-wireless-portable-megaphone) ## Best For - responsebridge enthusiasts ## Why This Product - Trusted responsebridge brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **All-Day Wireless Freedom:** Enjoy up to 12 hours of continuous use on a single charge—perfect for back-to-back presentations or outdoor events. - • **Powerful 18W Amplification:** Project your voice effortlessly to crowds of up to 300 people with crisp, distortion-free sound. - • **Rugged IPX5 Waterproof Build:** Take your voice amplifier rain or shine—built to withstand outdoor elements without missing a beat. - • **Ergonomic Wireless Mic System:** Comfortable headset mic with 35m wireless range keeps your hands free and your message loud and clear. - • **Bluetooth & Multi-Input Versatility:** Stream music or connect via TF card, U disk, or Aux for seamless audio flexibility anywhere. ## Overview The ResponseBridge RB-800U is a sleek, portable 18W Bluetooth voice amplifier with an IPX5 waterproof rating, designed for professionals who need clear, powerful sound outdoors. Featuring a wireless headset mic with a 35m range, 12-hour battery life, and multiple audio inputs, it’s ideal for teachers, coaches, tour guides, and presenters seeking effortless voice projection and versatile connectivity. ## Description Why Buy this Instead of other?? 1. This latest outdoor voice amplifier comes with Bluetooth and IPX5 Waterproof function which makes it very special and more practical, as you can not only use it to play music from your mobile phone through bluetooth but also can use it in most outdoor activities without worrying about the rain drop 2. It comes with 18Watt loud power, amplifys your voice and saves your throat. The sound is clear, crisp, no noise and no distortion. The max 18 watt sound can cover about 20000 sq.ft (2000㎡ ), loud enough to cover a big room; in this regards, we highly recommend you to use this powerful pa system speaker to any outdoor activities.(small indoor places are not recommended) 3. Extremely suitable for teachers, kindergarten, tour guides, coaches, promotion use, etc. 4. Support TF card / U disk / Recording / Audio input function. 5. Professional PA, almost no howling under correct operation. Attentions! 1. Please do not put the voice amplifier with headset microphone too close( >40-50cm ) otherwise it will have a sharp noise. 2. Before using, please turn down the volume and then adjust the volume according your need.3. Do no point the microphone toward the speaker. Specs & Details 1. Output power: 18W2. Charging Voltage: DC 5V3. Battery: 3.7V/2200mAh2pcs4. Working time:with 50% volume 810 hours (musical mode), 1213 hours (MIC mode)5. Charging time: 3-5 hours6. Product size:1209645mm7. Unit weight: 392KG8. Working temperature: -10℃45℃ 9. Frequency response: 90Hz18KHz What You Get --(Total 5pcs) 1 x wire headset mic1 x charging cable1 x 5V charger1 x audio cable 1 x user manual. ## Features - [Loud & Clear Sound Amplifier] This personal amplifier speaker comes with 18W original clear and high output which perfect for a group with 200-300 People. - [Wireless Microphone System, no burden] You will get a wireless uhf comfortable headsest microphone(35m/100ft), no need to carry the amplifier just put it on table around you. - [Long batery life] This portable microphone and speaker set comes with 4400mAh rechargeable battery, gives you up to 12 hrs wireless stable continuous amplification with a single charge; Microphone speaker set perfect for personal or commercial use large indoor and outdoor. - [Bluetooth pa speaker] Not only an amplifiers but also a bt speaker, you can stream your favorite music from any type of Bluetooth-enabled mobile device, up to 33 feet away; Also support Aux input, TF Card, U Disk more in one. - [What's your get] Voice amplifer*1, Wireless mic*1, Charger*1, User Manual*1, 3.5mm audio cable*1, Adjustable waistband*1 ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07D5YC4T8 | | Audio Input | TF Card, U Disk, Auxiliary | | Brand | ResponseBridge | | Color | Black | | Compatible Devices | Laptop, Smartphone | | Connectivity Technology | Bluetooth | | Connector Type | Aux | | Customer Reviews | 4.1 4.1 out of 5 stars (442) | | Enclosure Material | Acrylonitrile Butadiene Styrene (ABS) | | Item Dimensions | 11.9 x 9.7 x 4.6 centimeters | | Item Weight | 13 Ounces | | Mfr Part Number | RB-800U | | Model Number | RB-800U | | Mounting Type | Tabletop | | Number of Channels | 1 | | Output Wattage | 18 Watts | | Power Source | Corded Electric | | Unit Count | 1 Count | ## Product Details - **Brand:** ResponseBridge - **Colour:** Black - **Compatible devices:** Laptop, Smartphone - **Connectivity technology:** Bluetooth - **Item dimensions L x W x H:** 11.9 x 9.7 x 4.6 centimeters ## Images ![Bluetooth Voice Amplifier Speaker Waterproof, Microphone Amplifier Wireless Portable Megaphone Loudspeaker 18W Output for Outdoor, Teachers, Coaches, Elderly, Tour Guide, Presentation and More (Black) - Image 1](https://m.media-amazon.com/images/I/71Q9AdfbL4L.jpg) ## Questions & Answers **Q: How to pair this wireless amplifier and microphone?** A: Hi, normally we have already paired it for you before you receive the package, if you need to re-pair it, please follow the steps below and I will attach a video for your reference: Step 1: Turn on the voice amplifier, short press""M" key to switch to UHF mode, long press“M" key for 3 seconds,amplifier comes a voice prompt "UHF is waiting for conn-ection". Step 2:Turn on the wireless microphone and long press top key for 5 seconds, pairing is successful with a woiceprompt-UHF is connected". please contact the Service Department (cindyresponse@outlook.com)if you have any problems with the products. We will give you a positive response within 24 hours. **Q: can you connect to a separate speaker with music via bluetooth? I already use bluetooth for my music. Can I also connect two devices using bluetooth?** A: Yes, you can connect to a separate speaker with music via bluetooth. **Q: How do I get a second wireless mic headset for this to use when battery dies on first headset?** A: The wireless set is unreliable and I was never able to find a replacement. So I went with wired and no more problems. **Q: It says the battery can last up to 2-3 years. But I don’t see any opening on the devise to put new ones. Can the batteries be replaced by the owner?** A: It is a rechargable battery (in both the headset and the amplifier). If there is a limit on the life of the rechargable battery, I'm not aware of it and I've had no issues with my batteries after far more than 3 years. ## Frequently Bought Together - Wireless Voice Amplifier with Bluetooth 5.3 | 18W Portable PA System with Waist Clip, Waterproof Rechargeable Megaphone Microphone and Speaker for Teachers, Tour Guide, Presentation - W WINBRIDGE Voice Amplifiers Speaker Carry Case Cover Bag with Mesh Pocket Zip And Snap Hook Fit USB Cable Wall Charger Phone WB010 - WinBridge Portable Collar Clip Microphone 3.5mm Audio Compatible with All WinBridge Voice Amplifiers S6 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.bo/products/257233452-bluetooth-voice-amplifier-speaker-waterproof-microphone-amplifier-wireless-portable-megaphone](https://www.desertcart.bo/products/257233452-bluetooth-voice-amplifier-speaker-waterproof-microphone-amplifier-wireless-portable-megaphone) --- *Product available on Desertcart Bolivia* *Store origin: BO* *Last updated: 2026-07-07*