Features: Multi-functional - Bluetooth Receiver + Bluetooth Transmitter + Hands-free Phone Calls + Music Player + Wireless Selfie Bluetooth 4.2 - Wireless connection for easy operation.(Connection distance: 0-10m) Music function - Headphones or speakers can be lugged into the RX hole for hands-free listening, phone calls, song switching and volume adjustment One-click switching - Switch between TX and RX modes, blue light flashes to Bluetooth mode, green light flashes to audio transmission mode Large Capacity - Built-in 180mAh battery with 5-9 hours of music time, 4.5-6.5 hours of talk time, 7 hours of photo time and ONLY 2-3 hours of charging time Stylish and lightweight design for a comfortable using experience Specification: Type: Receiving Transmitter Model: BHM-07 Color: Red Product size: Approx. 49 * 49 * 15mm / 1.9 * 1.9 * 0.6in Bluetooth version: 4.2 Battery capacity: 180mAh Pairing name: Bluetooth Music Connection distance: 0-10m Function: Bluetooth Transmitter + Bluetooth Receiver + Hands-free Phone Calls + Music Player + Wireless Selfie LED breathing light: Yes Charging time: 2-3 H Music time: 5-9 H Talk time: 4.5-6.5H Photo time: 7H Weight: Approx. 60g Package list: 1 * Receiving Transmitter 1 * Instruction Manual 1 * Charging Cable 1 * Audio Cable Operation Instructions: 1. Charging When the USB is being charged, the middle red light is always on, and it can be used while charging, and when fully charged, light is off 2. Boot Press and hold the 'switch' button for 3 seconds, the voice prompt ''the device is ready to pair'', the boot is successful, and the surrounding blue light flashes 0.5 second/time 3. Pairing The blue light flashes (0.5 sec/time) and the pairing name is ''bluetooth music'' 4. Connections Phone boot > Setting > Open Bluetooth > Search for device ''bluetooth music'', and click to pair with the connection. The successful blue light flashes every 2 seconds. The phone displays ''Connected'' and the battery displays the power at the same time. 5. Bluetooth Short press the 'switch' button to play/pause; short press the '+' button to play the song, long press to increase the volume (maximum sound ''BIBI'' prompt); short press the '-' button to press the song, long press to decrease the volume; (For Apple system Synchronous display volume), when playing music, the surrounding three-color lights alternately flash, that is, blue for 4 seconds, 2 seconds, red for 4 seconds, then for 2 seconds, then green for 4 seconds, then for 2 seconds, and recirculated to blue for 4 seconds. The surrounding tricolor lights breathe. 6. Calls When calling, click the 'switch' button to answer, click again to hang up, press and hold the 'switch' button to reject the call; double-click the 'switch' button to call back the last number dialed by the phone 7. Launch Mode Click the 'M' button, flash for 1 second/time. The 'M' button can switch between TX and RX modes. The green light flashes to the transmitting mode. To use the transmitting mode, you need to insert the 3.5mm cable into the TX hole and connect the other end to the mobile phone or computer. 8. Connections Turn on the Bluetooth headset and enter the pairing mode, then close to the product. After the connection is successful, the product green light flashes slowly, other buttons are not available, you need to manually play music on the phone or computer. 9. Low electricity When the voltage is lower than 3.4V, the red light flashes every 2 seconds/times regardless of the TX and RX modes; 10. Shutdown Press and hold the 'switch' button for another 3 seconds, and the voice prompt ''power off'' will be turned off; Note: 1. Receive mode: The earphone is inserted into the RX hole (corresponding to operation 3 4 5 6) 2. Transmit mode: Audio cable is inserted into the TX hole (corresponding to operation 7 8) 1、Multi-functional - Bluetooth Receiver + Bluetooth Transmitter + Hands-free Phone Calls + Music Player + Wireless Selfie 2、Bluetooth 4.2 - Wireless connection for easy operation.(Connection distance: 0-10m) 3、Music function - Headphones or speakers can be lugged into the RX hole for hands-free listening, phone calls, song switching and volume adjustment 4、One-click switching - Switch between TX and RX modes, blue light flashes to Bluetooth mode, green light flashes to audio transmission mode 5、Large Capacity - Built-in 180mAh battery with 5-9 hours of music time, 4.5-6.5 hours of talk time, 7 hours of photo time and ONLY 2-3 hours of charging time