Product name: Bluetooth receiver and transmitter Product color: black Product type: Receiver and transmitter two-in-one Interface type: 3.5mm Product features: 1. Transmitter mode solves the problem that the TV cannot connect to the Bluetooth headset, and the world outside the headset is still quiet and will not disturb the family 2. Receiving mode instantly changes to Bluetooth speakers. Traditional speakers are connected to the AUX audio port or the RCA red and white audio port. Speakers without Bluetooth function can also be transmitted wirelessly 3. CD-level sound quality, no delay in listening to songs, high-quality chips, better Bluetooth sound quality and more sensitive response 4. Driver-free, plug and play, the computer is wirelessly connected to the Bluetooth headset or speaker to listen to music 5. Battery life is 8 hours, built-in rechargeable lithium battery, safer, internal circuit system It can be fully charged in just 2 hours Instructions for use: 1. First connect the device through the 3.5mm interface, select the transmission mode (TX) or receiving mode (RX) as needed, press and hold the power switch for 3 seconds, the product will start normally, and it will be in the waiting pairing state, and enter the fast pairing state (the red or blue light flashes quickly) 2. When using the receiving mode (RX), turn on the mobile phone Bluetooth, search for "B-10S' and click to connect 3. When using the transmission mode (TX), turn on the Bluetooth headset or speaker and enter the waiting pairing state, and this product will automatically connect to it 4. The Bluetooth flashes twice in 4 seconds, indicating that it is connected Product gross weight: 61g Package includes: hostx1 charging cablex1 3.5mm adapter cablex1 Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.