Wireless Doorbell, Door Bell Chime Kit, Long Range 1,050ft, 2 Transmitters & 1 Plug-in Receivers IP65 Waterproof Doorbell 38 Melodies, 5 Volume Levels & LED Flash for Home/Classroom (Black)

Specifications: Plugs into Any Standard Wall Outlet. Flashing Light Indicator. Wireless Range: 1050ft maximum in the open air Internal Sounds: 38 Chimes Volume: 5 level adjustable levels (20db to 110db) Receiver Power: AC 110V ~ 220V 50Hz / 60Hz Transmitter Power: 1 x 12V 23A battery(there is also a battery inside the doorbell) Package Includes: 2xTransmitter Button, 1xReceiver, 1 x please press the doorbell indicator, 1 x double-sided adhesive, 2 x large screw, 1 x small screw, 2 x expansion tube, 1 x lanyard, 1 x standby battery (Have also a battery inside the doorbell