Bluetooth Receiver. Features: The BTR3 is the first Bluetooth amplifier in the world to support all current wireless audio codecs – such as AAC, SBC, aptX, aptX Low Latency, aptX HD, LDAC, and LHDC. The 300 mAh battery in the BTR3 takes only 1.5 hours to fully charge but allows for a lengthy 11 hours of playback. BTR3 is also equipped with Qualcomm's cVc noise cancellation technology, which automatically adjusts the microphone and actively suppresses background noise so that your call comes through as clear and audible as possible. The BTR3 adopts New USB-C connector with USB DAC functionality. Specs: Bluetooth 4.2 supported. NFC supported. Headphone Output: 3.5 mm stereo jack. Frequency Response: 20～20 kHz (aptX), 20～40 kHz (LDAC). Including USB-C charging cable. Dimensions: 58 x 25 x 10.4 mm. Weight: 26 g.