Wireless Doorbell Set Waterproof LED Flash 58 Songs 4 Adjustable Volume Self Generating Doorbell Multipurpose for Home Apartment (US Plug 100‑240V)

Specification:
Item Type: Wireless Doorbell Set
Material: ABS
Transmitter
Power Source: Self generated
Size: Approx. 63x63x20mm/2.48×2.48×0.79in
Ambient Temperature: -20°C-+60°C
Transmission Distance: Open space > 150M
RF Frequency: 433MHz
Receiver
Power Supply: AC110-240V 50/60Hz
Power Consumption: 0.25W
Ringtones: 58
Ringtone Volume: ≥90dB
Ambient Temperature: -10℃-+45℃

How to Use:
Troubleshooting:
1. The doorbell does not : Check whether the receiver is plugged in and the socket is powered on.
2. Short transmission distance: Metal objects such as iron doors and iron frames will affect the effective transmission distance. Avoid placing the transmitter and receiver near metal objects.and ceilings also affect the transmission distance. Interference from other wireless devices, etc.

Package List:
2 x Doorbell
2 x Internal Machine
2 x Sticker
1 x Manual