Home Music Remote Control Wiress Doorbl 1. Simple humanized design, no need to ask for hp from professionals or installers, complety exempt the decoration expenses, avoid chising the wall, insert it into the conventional socket in the room, and ly move the installation position. 2. The use of wiress high-frequency transmission technology, innovative intra-frequency code and dialing function, effectivy avoiding the mutual interference between neighbors and the trouble caused by mistakes. 3. The ef obstacles is much better than similar products in the industry, and can meet the needs of different family environments. 4. The transmitter has a signature card indication function, and has a groove and a protective cover designed to place the owners signature card. 5. The receiver has an ultrasonic mosquito replent function, which truly realizes a multi-purpose machine. The receiver adopts fashionable streamline design and sandblasted craft multicolor optional decorative strips. 6. The use of constant voltage circuit design achieves a high-efficiency energy-saving effect and effectivy increases the service life by more than 50%. 7. It can be used normally for more than one year (no laboratory press, 30 times a day). 8. The use of wiress doorbls is affected by environmental factors such as ectromagnetic interference, installation on closed iron gates, occurrence of shiding, weather and humidity conditions, and the lack of timy battery replacement. 9. Extensive use, in addition to ordinary doorbls, it can also be used for special purposes such as , paging, patient care, and emergency notifications. 10. Receiver operating voltage: 200-240V 11. Power: =80m (open area) 14. Transmitter operating voltage: 12V (battery mod: 23A 12V) 15. Transmitter operating current