1. The crystal oscillator doorbell adopts wireless working mode, no wiring is required, which is convenient and quick. The remote control distance is super long, able to overcome man-made and natural obstacles, and the farthest receiving distance can reach more than 120m. 2. The working voltage of the receiver is DC 3V, which can meet the normal working needs of the doorbell and remote control. 3. The power is controlled within ≦2W, which can ensure the safety and stability of the doorbell and effectively reduce the consumption of power resources. 4. The working frequency is 315MHz, which is stable and reliable, and has strong anti-interference ability, which can effectively reduce false alarms or missed alarms. 5. The remote control/receiving distance can reach more than 120m in open areas, which can meet the needs of various large-scale outdoor use occasions. 6. The power supply of the doorbell set is powered by 3V 2AA batteries, which can still be used normally in case of sudden power outages, and is easy to maintain and replace. 7. The operating frequency of the transmitter is 315MHz, which matches the frequency of the receiver, which can realize stable and reliable remote control operation. 8. Powered by a 12V 23A battery, the maximum current does not exceed 15mA, which has achieved a good balance between high performance and long life.