Features: 1.  Transfer connection capable of transmitting and receiving signals of various electronic devices. 2.  Digital display on the screen, clearly visible 3.  High performance chip, quick response 4.  A variety of interface cables can support most devices on the market. 5.  Tablet, desktop computer, stereo, car, TV, mobile phone, power amplifier, etc. 6.  The connection is convenient, and the connection can be set according to different requirements. 7.  Support USB flash drive 8.  The product is connected with optical fiber line. Specification: Product Name: Digital Display Bluetooth Receiver Product model: C36 Bluetooth version: Bluetooth 5.3 Transmission distance: the open area is 10 meters long without any obstacles. Power supply mode: Type-C interface Product dimensions: 90mm (length) x 77mm (width) x 30mm (height) Product weight: 55g Interface type: AUX/ optical fiber/RCA/U disk. Transmission speed: 5(Mbps) Basic functions: Bluetooth receiving/U disk playing. Supporting equipment: mobile phone/tablet/computer/speaker/amplifier, etc. Operating steps: 1.  First, connect the Bluetooth receiver to the speaker with a 3.5mm audio cable, then plug one end of the charging cable into the power supply and the other end into the Type-C charging port, and press and hold the multifunction knob to turn it on; 2.  Find "C36" in the Bluetooth search of the mobile phone, and then select pairing; 3.  After the mobile phone is successfully paired with the device, you can now play music wirelessly, and the machine can control the up and down music (the multi-function knob can be turned to the left to increase the volume, and to the right to decrease the volume); 4.  Your phone is successfully paired for the first time, and it will be automatically reconnected when you turn it on next time. Note: the product has no built-in battery, please use the power supply cable first when using it, and the adapter should be controlled within 5V2A. Product list: Bluetooth adapter *1 Optical fiber connection line *1 RCA audio cable *1 3.5mm audio cable *1 Power cord *1 Instructions *1