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TECKNET Door Alarm Sensor, Window Alarm Sensors, 2-in-1 Alarm & Chime, 3-level Volume Control, Wireless Burglar Alarms(6 PCS)

TECKNET Rechargeable Doorbell Wireless Bluetooth Speaker, Portable Bluetooth Speaker with Stereo Sound for Phone Music Play.

TECKNET Wireless Doorbell, Plug in Door Bells with 2 Receivers, IP66 Waterproof Door Chimes, 400m Range, 60 Chimes, 5 Volume Level