PLEASE MAKE SURE YOUR DVR SUPPORTS COAXIAL AUDIO INPUT Hikvision 5MP Bullet camera with inbuilt Audio Mic for voice recording Camera: Image Sensor 5 MP CMOS Max. Resolution 2560 (H) 1944 (V) Min. Illumination 0.01 Lux@(F1.2, AGC ON), 0 Lux with IR Shutter Time PAL: 1/25 s to 1/50, 000 s NTSC: 1/30 s to 1/50, 000 s Day & Night ICR Angle Adjustment Pan: 0 to 355 , Tilt: 0 to 75 , Rotation 0 to 355 Signal System PAL/NTSC