Wireless PIR: GEM-PIRPET   • Pet Immunity for up to 40 lbs. (18.16 kg) and maximum range of 40' (10.5m)   • Interchangeable Lens Bank of 11 optional lenses   • Signal Selective Processing for the most reliable stable operation   • Automatic Temperature Compensation for all seasonal and room temperature fluctuations     • Superior lightning and surge protection with fully-shielded SMD circuitry   • Same Crystal-Controlled performance and programming as other Gemini transmitters   • Includes lithium batteries and mounting screws