... ,controller, keyboard control; support GUI; Buzzer & Screen tipsLanguageEnglish and Chinese, more language need update; Recording ModeManual, schedule, motion ... getting front-end PTZ protocolAlarm function1. 4 channel alarm input, 1 channel output 2. Alarm trigger: motion detect, ... lost;3. Alarm trigger the dvr’s recording, interlinked PTZ, voice notice, alarm output and snap picture.4. support alarm ...