Features BK1 BK3 BK4
Description Magnetic door contact Transmitter with 3 inputs Transmitter with 3 inputs and magnetic door contact
Compatible receivers P series panels, EXT116s P series panels, EXT116s P series panels, EXT116s
Operating frequency 868 MHz 868 MHz 868 MHz
Communication range in building
Up to 100m Up to 100m Up to 100m
Communication with hopping code Selectable Selectable Selectable
2-way technology Yes Yes Yes
Contact Open transmission Yes Yes Yes
Contact Close transmission Yes Yes Yes
Tamper Changed transmission Yes Yes Yes
Battery low status transmission Yes Yes Yes
Supervision transmission Every 1 hour Every 1 hour Every 1 hour
In-built magnetic contact  Yes - Yes
In-built inputs for external detectors - 3 3
External detector = magnetic contact - OK OK
External detector = roller type detector - OK OK
External detector = vibration detector - OK OK
Unique ID number for magnetic contact Yes - Yes
Unique ID number for every in-built input - Yes Yes
Power supply Lithium battery, ½ AA, 3.6V Lithium battery, ½ AA, 3.6V Lithium battery, ½ AA, 3.6V
Battery life >3 years >2 years >2 years
White color model BK1 BK3 BK4
Brown color model BK1_br BK3_br BK4_br
Overall dimensions W x H x L in mm 27 x 23.6 x 75 27 x 23.6 x 75 27 x 23.6 x 75
Operating humidity
0% - 70% 0% - 70% 0% - 70%
Operating temperature -5oC up to +50oC -5oC up to +50oC -5oC up to +50oC