Anyone know what the "charging off" switch is for? Why would I turn the charging ability off? The unit plays music fine with it off or on?

1) you need to switch it on to charge the unit. 2) you can set it to off to prevent it drains battery of your phone when you connect it (via usb-c not bluetooth) to your phone. 3) the unit plays music fine regardless of this switch's setting. hope it helps.

For those on ios (iphone or ipad), are you able to save your 3 custom eq settings on to btr7 from fiio control? heard there was a bug.

This is bad advice. The app is extremely easy to use and the parametric equalizer is perhaps the best feature and the reason I purchased this amp. I use iOS and saving the settings is easy and practically automatic. The custom EQ is only adjustable through the app. I’m not sure why so many people have problems using it. It seems so simple to me. My only issue is when you reset the custom EQ to default (flat), it resets all 3 at once. It would be better if you could individually reset each one.

Can this be charged while in use?

Sure can. This little amp is amazing!

Will this product increase the frequency range of my headphones? currently 20-40,000 khz, will this get it down to 10khz and improve dynamics qualiy

Your headphones' current range is 20hz to 40,000 Hz or 20hz to 40 kHz. It is already past 10 kHz, and will not reduce it. What this device will do is improve sound quality with less background noise, or hiss and so more dynamic range.

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BTR7 Headphone Amp Bluetooth Receiver High Resolution Portable DAC Supports MQA/LDAC/aptX HD 384K/32Bit DSD256 for Phone/PC/Car/Home Audio

Product ID: 458570626

Details

Brand
FiiO
Interface Type
USB
Mounting Type
Cable Mount
Number of Channels
2
Number of Pins
7

🎧Dual 3.5mm + 4.4mm Balanced Output

🔊384kHz/32bit Hi-Res Audio

🔗Bluetooth 5.1 with LDAC & aptX HD

Bs.2772

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Description

🎶 Elevate your audio game—hear what others miss!

COMPACT POWERHOUSE - Lightweight aluminum design packs ES9219C DAC chips for dynamic, rich sound anywhere—phone, PC, car, or home.
CRYSTAL CLEAR CALLS - Built-in cVc 8.0 noise cancellation and microphone deliver pristine voice quality on Bluetooth calls.
VERSATILE DUAL OUTPUTS - Switch effortlessly between 3.5mm single-ended and 4.4mm balanced outputs for tailored headphone compatibility.
AUDIOPHILE GRADE CLARITY - Experience ultra-high resolution sound with native DSD256 and MQA 8x decoding for every nuanced detail.
SEAMLESS WIRELESS FREEDOM - Bluetooth 5.1 with LDAC, aptX HD, and AAC ensures lossless, low-latency streaming from any device.

The FiiO BTR7 is a premium portable headphone amplifier and Bluetooth receiver featuring Bluetooth 5.1 with support for LDAC, aptX HD, and AAC codecs. It delivers high-resolution audio up to 384kHz/32bit PCM and native DSD256, with MQA 8x decoding for studio-quality sound. Dual outputs (3.5mm and 4.4mm balanced) ensure compatibility with a wide range of headphones. Equipped with ES9219C DAC chips and cVc 8.0 noise-cancelling microphone, it offers exceptional sound clarity and seamless wireless connectivity for phones, PCs, cars, and home audio systems.

Specifications

ASIN	B09ZKJ5P5R
Audio Output Mode	Single-Ended, Balanced
Best Sellers Rank	#19,734 in Electronics ( See Top 100 in Electronics ) #35 in Headphone Amps
Brand Name	FiiO
Compatible Devices	Phones, PC, Car, Home Audio Systems, Bluetooth-enabled Devices
Customer Reviews	4.4 4.4 out of 5 stars (487)
Interface	USB
Item Dimensions L x W	1.56"L x 3.29"W
Item Weight	45 Grams
Manufacturer	FiiO
Material Type	Aluminum alloy, High-strength glass
Model	SFNS2031
Mounting Type	Cable Mount
Number of Channels	2
Number of Pins	7
Part Number	BTR7

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Bs.2772

Duties & taxes included

In stock

Sold byAmazon BoliviaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Bolivia.

Secure transaction

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