This audio adapter is made of , which can withstand use. Features the ABS and electronic components material, which has high durability, not easy to deform. Fine workmanship, ensures practicality. Features -Color: Black -Material: ABS, electronic components -Size: 6.50X4.50X1.80cm/2.55X1.77X0.71in Version: 5.0 Operating Range: Up to 10m / 33ft (without any objects) Charging time: 2 hours Working hours: 12 hours Battery Type: 400mAh - First adapter to receive mode, find the adapter in the settings of the for pairing. - The blue light flashes twice per second during the pairing process, and once every three seconds after the pairing is successful. - Plug one end of the audio cable into the audio input of the speaker, and the other end into the audio connector of adapter to play music. - Transmitter mode can transmit audio from non- devices to -enabled devices. - The receiving mode can be used in home, car and other scenarios, allowing speakers without function to have function. Package list: 1 x adapter 1 x micro USB cable 1 x 3.5mm to cable 1 x 3.5mm to 3.5mm cable