Xpir range is based on a simple device with PIR sensor and rechargeable via Micro USB. Few different configurations:

Xpir-1 is a motion detector

Xpir-2 is a motionless detector (detecting lack of movement)

Xpir-3 is an occupancy detector (suitable for office desks and meeting rooms occupancy monitoring).

Xpir-4 is an outdoor motion detector – IP67 casing.