2TB HDD Support 4 Channel DVR Security System Digital Data Encryption Video Recording

2TB HDD Support 4 Channel DVR Security System Digital Data Encryption Video Recording Specifications: General information for the receiver ( monitor ) System item SP890 Monitor size 7' TFT - LCD RGB color Transmission frequency 2.4GHz-2.485GHz Modulation type digital RF Antenna type All-directional Receiving sensitivity ≤ 85dB Contrast 300:1 Brightness 300 cd / m2 Power supply DC 5Volt / 1000mA Color White or black Working humidity ≤ 85% RH Working temperature -10℃ ~ 50℃