... Alarm+PTZ+network 4.USB Home-type video security surveillance 4ch DVR1.H.264 main profile compression2.Realtime live ... Control8.Easy backup: supports USB device, network and client software backup9.Supports Alarm triggering, buzzer, PTZ preset,show message ... Spanish, Thai, Chinese, Traditional Chinese, Turkish, optionalVGA Display :Yes Software Upgrade :USB/IE/Multi-Client Power Supply : 12V / 3A ...