1. Press top tab to remove sensor from backplate
2. Hold top and bottom tabs then pull to remove sensor from front cover
3. Replace batteries then reassemble and replace sensor on backplate
4. Batteries are either 2 AA Alkaline or 1 SAFT LS-14500 3.6-Volt Lithium
1. Remove motion from backplate by insterting screwdriver into bottom slot
2. Battery is SAFT LS14250 3.6 Volt Lithium battery
