Solar Doorbell Waterproof Wireless Electronic Smart Doorbell Receiver Transmitter Kinetic Energy Old Man Pager Guards (Color : Black 1V1)

Product specifications:
Host matching use: transmitter+receiver [quantity can be freely matched]
Transmitter battery: 150mAh polymer lithium battery (solar charging)
Work reference index: 5.5V 25mA 0.13W
Working current: 12mA
Use lights to remind you to press the button for 0.5 seconds in response
Receiver working voltage: AC: 90-260V 50Hz
Receiver power consumption: 0.5W
Protection level: IP65
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Working frequency: 433MHz
Transmitter working voltage: 3.7V
Volume adjustable range: 25 to 100dB
Low power consumption of transmitter: 10mw
Working range: approximately 20-100m (outdoor)