No Battery Required Home Kinetic Energy Wireless Doorbell Waterproof High Volume Long-Distance Emergency Call Bell

1. The transmitter is powered by pressing and does not require batteries for life, making it green and environmentally friendly 2.90 decibels high volume, four level volume adjustment, can be set to mute 3. Simple appearance, mini and compact, round and cute 4. The transmitter is not afraid of water and can be installed outdoors or in a washing room 5.38 ringtones to choose from, pleasant and melodious, with high notes not broken 6. Long distance signal transmission can pass through walls (approximately 30 meters indoors and 150 meters in open spaces) 7. Wide voltage design AC 85v-250v 50/60hz can work, globally applicable 8. There are three exterior colors: white, black, and gold 9. Multiple plug specifications are available, including American, European, and British standards

Please note:

1. Our product needs to be used in conjunction, and purchasing a transmitter or receiver alone will not work unless you have previously purchased our product and need to purchase additional accessories.

2. Our product uses RF433 communication, but it cannot be mixed with other RF433 products because in addition to frequency, it also needs to meet the requirements of decoding and coding speed.

Technical parameters