1. Receiver working voltage: 110-240V 2. Transmitter working voltage: 4.5V (3 AA batteries) 3. Receiver button: 1) Music: 38 music pieces are optional, the music logo button on the side can be adjusted. 2) Volume: Three-speed volume adjustment (high, medium, low) side volume logo button to adjust 3) Sound and silence can be adjusted (sound: sound + indicator light, silence: indicator light) 4. Working distance: up to 70 meters 5. Transmitter detection distance: 3-7 meters 6. Receiver size: 76*80*33mm 7. Transmitter size: 80*59*45mm Product operating instructions 1. Plug the receiver into the socket to turn on, open the battery cover of the detector and insert the battery. 2. Place the rotating bracket on the back of the detector and stick it in. 3. Push the detector switch to the ON position, wait 10 seconds for the self-test time, and then enter the normal working state. Precautions: 1. Try to avoid installing the sensor in a position directly facing the large airflow and near the