Product Name : Outdoor High Speed Dome Camera Model NO : VT-OF185CF / VT-OF185BF / VT-OF275BF With track remember function. Continuously totate 360 degrees,the fastest speed can reach to 300 degrees per second. 4-channel alarm input,1-channel alarm output 128 presets. OSD English function. Integration kinds of protocols ,baud rate could transfer and freedom optional. Adopt AC 24V power supply ,internal & extrinsic synchronization.