Taking a look at the FiiO BTR1 Bluetooth Headphone Amp
The FiiO BTR1 Bluetooth Headphone Amplifier is almost entirely made of metal except for the matte black plastic bottom portion. This is to allow Bluetooth wireless signals to pass through. Otherwise, the little FiiO BTR1 will act as a Faraday cage.
On the back of the FiiO BTR1 is a metal clip for clipping it to your clothing or bag. It is pretty wide so it should stay in place when clipped. If you prefer to hang it off your neck, the lanyard can be attached to the clip. To the top left hand corner of the FiiO BTR1 is the microphone. Yes, the FiiO BTR1 supports Bluetooth voice call.
On the top face of the FiiO BTR1 is the 3.5mm headphone jack. It has a super-low 0.2Ω output impedence that ensures no signature deviation. It is capable of driving 16~100Ω headphones.
On the other end is the micro-USB port for charging. Unfortunately, the FiiO BTR1 does not work as an USB DAC. I hope it does in the future.
At the front of the FiiO BTR1, you will find the universal button for powering on or off the BTR1 plus handling functionalities like pairing, playing music, pausing music, answering calls, etc. Pressing the button twice rapidly toggles the sound effect or DSP mode. The green led indicator on the button turns on when the sound effect is active.
With regard to calls, there are a couple of tips and tricks in using the universal button.
|Answering call||Press the button once|
|Ending call||Press the button once during a call|
|Rejecting call||Press and hold the button for 2 seconds|
There is also a status indicator near the lower part of the BTR1 that flashes red and/or blue to give you an idea of what is it’s current status. There are audio prompters as well. On power on, there is a boot up chime that goes from the left to right.
|Power on/off||Blue light flashes for 3 times|
|Power on without connection||Blue light flashes twice every 2 seconds|
|Pairing mode||Blue and red lights flash alternatively|
|Device connected||Blue light flashes every 2.5 seconds|
|Low battery warning||Red light is constantly on but flashes blue intermittently to reflect its working status|
|Charging||Red light is constantly on but flashes blue intermittently to reflect its working status|
|Charging complete||Red light is off but blue light flashes intermittently to reflect its working status|
On this side are the controls for volume and sound tracks. The buttons, although a little small for my liking, are still easy to press. A short press on the buttons changes the volume while a long press changes the sound tracks.