Wireless Motion Sensor Alarm Home Security Music Doorbell Driveway Alert System Notes: The product is packaged in a neutral color box, and the product specifications are two types of EU and US. Please note the specifications when purchasing! Parameters: 1. The working voltage of the receiver: 110-240V 2. Transmitter working voltage: 4.5V 3. Battery: Need 3* AAA batteries(not included) 4. Receiver button: 1) Music: 38 pieces of music are optional, and the music logo button on the side can be adjusted. 2) Volume: three levels of volume adjustment (high, medium, low), side volume button to adjust. 3) You can set the sound and silent (sound: sound + indicator light, silent: indicator light) 4. Working distance: up to 70 meters 5. Transmitter sensing distance: 3-7 meters 6. Receiver size: about 76*80*33mm 7. Transmitter size: about 80*59*45mm 8. Packing size: about 17.5*11*7.5cm 9. Product gross weight: about 0.22kg, net weight: about 0.14kg Packing list: 1 X Receiver 1 X Transmitter 1 X Manual Product operation instructions: 1. Plug the receiver into the socket and power on, open the battery cover of the detector and insert the battery. 2. Put the rotating bracket into the back of the detector and jam. 3. Push the detector switch to the ON position and wait for 10 seconds to enter the normal working state. Precautions: 1. Try to avoid installing the sensor in a location directly facing the large air flow and close to the heat source. (Such as: cold air outlet, exhaust fan port, electric stove or nearby heating, etc.). Do not install the sensor directly in a place exposed to the sun and rain, nor close to metal objects. 2. The sensor should be installed at a height of about 2 meters; the lateral detection of the sensor is more sensitive than linear (the human body directly faces the sensor), and it should generally be installed on the side or top of the entrance gate, and adjust the sensor to a suitable position through the mounting bracket In order to achieve a relatively good sensing effect. 3. The interference between the sensor and the receiver should be reduced as much as possible. Generally, under the obstacle of a wall, the distance between the sensor and the receiver should be controlled at about 20 meters. 4. If the doorbell has a short receiving distance or malfunctions, please check the detector battery or replace it. 5. If the ambient temperature is too high (more than 30 degrees), the sensing distance of the detector will be shortened, which is a normal phenomenon.