Sell Wireless Doorbell 1sp 2remote Ac220v best price

Style：AC220V 1 # wireless doorbell A doorbell, a doorbell remote, a small battery. The wireless transmission distance is 1 to 15 meters. Are there obstacles affecting transmission. The host of this product uses AC-220v power input. Frequency range ± 150m 32 chord Power: 220v 2 # wireless doorbell Two doorbells, one remote control, two small batteries. The wireless transmission distance is 1 to 15 meters. Are there obstacles affecting transmission. The host of this product uses AC-220v power input. Frequency range ± 150m 32 chord Power: 220v 3 # wireless doorbell One doorbell, two doorbell switches, two small batteries. The wireless transmission distance is 1 to 15 meters. Are there obstacles affecting transmission. The host of this product uses AC-220v power input. Frequency range ± 150m 32 chord Power: 220v Style：4# DC3V Doorbell 1speaker 1remote Speaker power sa battery Remote power sa battery Power: two dry batteries 3v 1-15 m wireles