This wireless audio receiver transmitter is made of , which can withstand use. Features the PC material, which has high durability, not easy to deform. Fine workmanship, ensures practicality. Features -Color: Black -Material: high strength fireproof PC -Size: 9.20X6.50X2.00cm/3.62X2.55X0.79in Version: 5.0 Music format: MP3/ /FLAC/WAV/WMA Output port: AUX, Input port: , AUX, , optical Transmission distance: about 10m Battery: 500mAh - Built-in digital to analog signal chip, direct input of optical fiber and signal into analog signal output or wireless transmission to wireless headset. - Comes with optical fiber and interface, built-in digital to analog core can realize digital signal input to /AUX analog output or wireless transmission. - 5-8 meters infrared operation, with infrared and high-definition display screen, mode switching/play/pause/volume adjustment, etc. - 10 meters of barrier-free transmission signal is enough to cover the entire room, and it is better to use with infrared remote control. - Lossless sound quality transmission, the sound is as silky as silk, and the purity of the sound is as clear as a musical instrument playing . Package list: 1 x Host 1 control 1 x 3.5mm audio cable 1 1 x Charging cable 1 x Manual