Supports D1 image H.264 compression Supports IE browser/client software Supports remote browser administration Supports simultaneous transmission of audio and video Image sensor: 1/3-inch Sony CCD Horizontal resolution: 420TVL Processor unit: 32-bit high-performance embedded processors Software: real-time operating system (RTOS) Video input: PAL system Composite video: BNC connector Audio input: microphone input, non-balance, mono, RCA connector Audio output: line level, non-balance, mono, RAC connector Image compression: H.264 Audio compression: MP3 Image adjustment: lightness, contrast, color, saturation level of image quality adjustment Support resolution: 704 x 576, 704 x 288, 352 x 288 pixels Maximum output frame rate: 25fps (PAL) Network bandwidth: occupied 64Kbps to 4Mbps Data connector: 485 data transmission can be transparent Network connector: 10/100M Control bus: RS485 Alarm input: 1 to 4 channel, supported the normally open normally closed probe Alarm output: 1 to 4 channels switch Input voltage: 12V DC, 1.5 to 3A