1、100% brand new and high quality, high quality production gives you high quality guarantee. 2、This item is not support all the monitors, your monitor must compatible the item. 3、If DVR can open but your monitor can not show image, please know first to change VGA or HDMI Cable,then change one. 4、New monitor to check again,old monitor and some of the TV can not work will be normal. 5、The signal transmission is stable, the picture is not stuck, and the sound quality is smooth. Features: 100% brand new and high quality, high quality production gives you high quality guarantee. This item is not support all the monitors, your monitor must compatible the item. If DVR can open but your monitor can not show image, please know first to change VGA or HDMI Cable,then change one. New monitor to check again,old monitor and some of the TV can not work will be normal. The signal transmission is stable, the picture is not stuck, and the sound quality is smooth. Specifications: Condition: Brand New Material: ABS Color: White Operating system: embedded LINUX operating system System resources: multi-channel real-time synchronous recording, multi-channel real-time playback, multi-channel multi-user network operation, USB backup. Operation interface: 16bit true color GUI interface supports mouse operation Display: 1/4 screen (take analog channel as an example, others based on selected channel mode) Video standard: PAL / NTSC (1080P) Image coding: H.264 (High Profile); JPEG Display quality monitor: D1; VGA, HDMI: High definition (supports 1920 * 1080 / 1280 * 720/1440 * 900/1280 * 1024 / 1024 * 768 / 800 * 600) Playback quality: 1080P / 720P / D1 / HD1 / CIF Coding ability: 4 * 1080N (12FPS) Decoding ability: 4 * 1080N (12FPS) Multimode video input AHD: 4 * 1080NH (25FPS) / 4 * 720PAHDM (25fps) / 4 * 960H HVR: 2 * 720P (AHD) + 2 * 720P (IP) NVR: 8 * 1080P / 16 * 960P / 8 * 720P Motion detection: 192 (16 * 12) detection area per channel; multi-level flexibility can be set (only for local analog channels) Audio compression: G711A Two-way conversation: support Record mode: Manual > Alarm > Motion Detection > Timing Local playback: 1-4ch synchronous playback (take local analog input as an example, others depend on the selected channel mode) (support 4CH to play together) Video Search: Time/Date/Event/Channel Search Occupy video: CIF 4~5G / day * channel, D1 16~20G / day * channel; Audio: 691.2M / day * channel Video storage: local hard drive / network Backup mode: network backup / USB portable HDD / USB imprint / SATA imprint Video input: 4CH BNC (1.0Vp-p, 75Ω) Video output: 1CH VGA, CH HDMI Audio input: 1CH RCA Audio output: 1CH RCA (200-3000mV, 5KΩ) Alarm input: N / A Alarm output: N / A Network port: RJ45 10M/100M adaptive Ethernet port PTZ control: no PTZ USB port: 2 * USB2.0 HDD port: 1 SATA port (maximum 8TB each) (must be 3.5CH HDD) If your hard drive is not 3.5CH, please don't use it with our project! Wireless port: 3G, WIFI is not supported Power: 12V/2A (If you use more than 2tb hard drive, please replace 12V4A or more by yourself) Consumption: <15W (excluding hard disk) Temperature: -20~55°C Humidity: 10%-90% Air pressure: 86kpa-106kpa Package List: 1 * Video Recorder 1 * Mouse 1 * Instruction Manual 1 * Power Adapter 1 * Screw Package Note: 1.If the DVR can be turned on, but your monitor cannot display images, first know to replace the VGA or HDMI cable, then change a new monitor to check again. Old monitors and some TVs don't work! 2.Secure DVRs must be used with a secure hard drive, and most PCs will not work properly if you use a PC hard drive! 3.If your hard drive is not 3.5 CH, please don't use it with our project!