Sell Mijia Linptech Self Powered Wireless Doorbell Self-generating Electricity Ringtone No Battery No Wire Basic Version best price

- Self-powered electricity, pressing the button and force into electric energy. - No wire no battery required in transmitter, just plug and use with receiver. - 5-level sound volume adjustable, choose your favorite ringtone. - One transmitter can pair with many receivers with 36 of ringtone. - Smart chipset with memory function about the set ringtone storage after powering off. - Durable flame retardant matte surface, simple and fashionable design. Local seller warranty 3 months