Insteon Motion Sensor II
Overview: The 2nd generation motion sensor is about 1/3 the size of the original model. No move 9V battery. The new model can be powered by a USB Cable or a CR123A 3.0V Battery.
Model#: 2844-222
Price $39.99
https://www.smarthome.com/insteon-motion-sensor-ii.html
Quick Start Guide
https://cache-m2.smarthome.com/manuals/2844-222-quick-start-guide.pdf
Manual
https://cache-m2.smarthome.com/manuals/2844-222-manual.pdf
Photos