Alibi ALI-TB40-UAI Vigilant 4MP Thermal Optical Bi-Spectrum 164ft IR Starlight SmartSense IP Bullet Camera with Red-Blue Strobe, Mic and Speaker4. 0 megapixel progressive scan CMOS Thermal & Optical dual spectrum image, dual video with single IP address, adaptable to more various scenes 1 2. 8" target surface, high sensitivity sensor, satisfy the need of starlight monitoring Thermal module support reliable fire detection, smoking detection and fire shield area Thermal module supports temperature detection and cold&hot spot tracking which highlights the abnormal temperature, and link to alarm