Product parameters: 1. Receiver working voltage: 110-240V. 2. Transmitter working voltage: 4.5V (3 AA batteries) 3. Receiver buttons: 1) Music: 38 pieces of music are available, and the music logo buttons on the side can be adjusted. 2) Volume: Three-level volume adjustment (high, medium, low), adjust the volume mark button on the side. 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 8. Package size: 17.5 x 11 x 7.5cm. 9. Product gross weight: 0.22kg net weight: 0.14kg packing list: 1X receiver 1X launcher 1 XInstruction manual Product instructions 1. Plug the receiver into the socket and turn it on, open the battery cover of the detector and insert the battery. 2. Place the rotating bracket on the back of the detector and lock it. 3. Push the detector switch to the ON position and wait for 10