
APPENDIX A: Specifications
D-306488 WK250 Installer’s Guide
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APPENDIX A: Specifications
Frequency Band (MHz)
Europe and rest of world: 433-434, 868-869 USA: 912-919
Communication Protocol
PowerG
Battery type
Four 1.5V AA Alkaline batteries
Battery Life Expectancy
3 years (for typical use).
Low Battery Threshold
3.8 V
Power source
Battery:
4.8VDC – 6VDC
Back light
Blue (keypad) / white (display)
Operating Temperature
0
°
C to 55
°
C (32
°
F to 131
°
F)
Humidity
Average relative humidity of approx. 75% non-condensing. For 30 days per year,
relative humidity may vary from 85% to 95% non-condensing.
Dimensions (WxLxD)
150x100x20mm (5-7/8 x 3-7/8 x 13/16 in)
Weight (including battery and bracket)
379 g (13 oz).
Mounting
Wall-mounted or desktop
Color
White