Rich Interface: Built-in digital to analog chip, easy to support various of o devices, with AUX/RCA/optical/coaxial interface, plug and play, convenient to use. NFC Pairing: Built-in BT inproduction chip, phone near the NFC sensor area can be connected, compatible with all kinds of cell phones. Tap to connect and pair, reducing the cumbersome operation of connecting the phone to BT. No Delay: Support USB and TF card playback, maximum support 64G capacity, lossless transmission without delay, better sound quality, support MP3/WMA/APE/FLAC/WAV and other formats. Reliable Performance: Built-in ceramic antenna and signal gain amplifiers, room connection without dead ends, 10m transmission sound quality without delay, stable signal without lag. Expanded BT: Car BT expansion module, built-in high clear microphone, support listening/navigation/hands-free calling, etc., one button switch, free your hands, r driving. source switching and other functions. Memory Function: Built-in memory chip, can automatically restore to the mode, frequency, songs, etc. before power failure, intelligent voice reminder, warmly remind a variety of operating status. LED Display: Equipped with LED high-clear digital display, BT receive/transmit/FM status is clearly visible, easy to operate, with light orange light, soft and not dazzling. High-Quality: Compact size, the surface is made of fireof PC material, high-gloss baking paint cess, nice durability, more exquisite with red/blue breathing light design. The bottle is equipped with silicone pads, antislip and not easy to scratch the desktop. Strong Compatibility: Practical and powerful, compatible with a variety of input signals, supporting devices such as phones, tablets, computers, TVs, speakers, o amplifiers, jectors, mixers, etc. Specifications: Color: Black Material: High-Strength PC BT Version: BT5.0 Support tocol: A2DP/AVRCP Operating Frequency Band: 2.402-2.480GHz Sensitivity: -85dBm<0.1%BER Signal to Noise Ratio: ≥90dB Distortion: ≤0.1% Input Voltage: USB 5V Battery: Built-in 3.7V, 500mAh Lithium Battery Charging Current: About 400mA Charging Time: About 2 Hours Transmission Distance: 10 Meters(Ber Free) Interface: Input: 3.5mm AUX/RCA/Optical/Coaxial/USB/TF Output: 3.5mm AUX/RCA Supported Format: MP3/WAV/WMA/APE/FLAC/G729/M4A/ALAC/AMR/DTS/MIDI/G726/MTY Screen Size: 36 * 8mm/ 1.4 * 0.3in Item Size: 92 * 65 * 20mm/ 3.6 * 2.6 * 0.8in Item Weight: 75g/ 2.6oz Package Size: 120 * 120 * 35mm/ 4.7 * 4.7 * 1.4in Package Weight: 155g/ 5.5oz Packing List: 1 * BT Adapter 1 * Remote 1 * AUX Cable 1 * RCA Cable 1 * USB Cable 1 * User's Manual