High lights□ √ Built-in HD camera with infrared night vision, adopt H.264 codec (only i16SV)□ √ IP65waterproof and dustproof.□ √ IK10anti-collision with robust die-cast aluminum frame□ √ Anti-tamper- alarming as long as the cover is apart from the housing, and reporting to the control center at the same time i16S i16SV Model Network Button Camera□ √ HD voice speech quality with built-in 3W speaker and Acoustic Echo Canceller □ √ Audio line out port, expandable external active speaker.□ √ Built-in 2 short-in detect port and 2 short-out control port□ √ Support built-in TF card slot for data storage or audio offline broadcasting.□ √ Compatible with major platforms: Asterisk, Broadsoft, 3CX, Metaswitch, Elastix, Avaya etc.