Description :   KERUI RC527 Wireless 4 Buttons Alarm Remote Control 433MHz for Burglar System Lock Unlock SOS Alarm   Features :  Wireless type、 four buttons (Lock、 Unlock、 emergency、 Alarm) Easy to got it that is convenient for users to choose various types. Power Supply: 12V DC Battery Life: 1 -3 years Wireless Frequency: 433MHz Transmission Distance: 100m - 300m (Open area) Working Current: 15 mA Coded IC: 1527   Package includeds :  1 x KERUI RC527 Wireless Remote Control (Battery Includes.)   Details pictures :