Note: Manual measurement, please allow some errors. Specification: Item Type: BT Receiver_x000D_Material: ABS_x000D_Receiver Size: Approx. 92 x 88 x 26mm / 3.6 x 3.5 x 1in_x000D_Antenna Length: Approx. 108mm/4.2in_x000D_Item Model Number: BT08_x000D_BT Version: BT V5.0_x000D_Transmission Distance: Barrier Free 30m/98.4ft_x000D_Output Parameters: DC 5V_x000D_Music Format: MP3, APE, FLAC, WAV, WMA_x000D_Basic Functions: BT Reception, Infrared Remote Control, Microphone, Digital to Analog, U Disk, K Song_x000D_Supported Equipment: Mobile Phone, Tablet, Computer, TV, Speaker, Amplifier, Projector, etc._x000D_Input Interface: Microphone, Coaxial, U Disk, Optical Fiber_x000D_Output Interface: BT, RAC, AUX_x000D_Remote Control Battery: Built in Lithium Manganese Battery, 1 x CR2025, 150mAh Features: 1[No Delay] BT 5.0 chip, powerful performance, digital signal conversion and transmission, fast speed, no delay, strong compatibility, can be connected to speaker, power amplifier, TV, headphones, etc. 2[Multi Function] Digital to analog, karaoke function, with remote control, support for sound effect adjustment, signal switching, song switching and other operations, wireless control is more convenient. 3[Input And Output] Multi mode digital to analog conversion, support AUX and RAC output, BT, microphone, U disk, coaxial and optical input, so that ordinary speaker can be upgraded to BT speaker. 4[U Disk Playback] Insert U disk to play automatically, built in high definition lossless decoder, automatically resume songs after booting, support MP3, WAV, FLAC, WAM, APE music formats. 5[Easy To Use] Plug and play, the speaker without power amplifier can also be connected to the microphone, two active speakers can be connected at the same time, the signal is stable and synchronized output. PackageList: 1 x Charging Cable 1 x Optical Fiber Line 2 x Sound Cable 1 x Manual 1 x BT Receiver 1 x Antenna 1 x Remote Control