Features:1. All of our items are brand new2. 3.5�� TFT display screen， resolution: 960*2403. Portable wristband design for more convenience4. Easy to debug the camera focal length， focus and angle position5. Support audio and video function6. Support automatic PAL/NTSC identification7. Support 3 minutes Non-video automatic sleep function8. Built-in 2200mA lithium batterySpecification:Brand:RETEVISModel:RT-3501Screen:3.5 inch TFTResolution:960*240Shell material:Engineering ABS plasticSurface treatment:Polyester wadding (elastic paint)Battery:18650 lithium battery DC3.7V (2200mA)Machine power consumption:W (12V emergency power does not open)Charger:AC110V~220V， 5V/600mAVideo input standardLPAL/NTSCVideo input:1.0Vp~pEmergency power output:DC12V/0.5AAudio input:0.7Vp~pAutomatic sleep:3minutesOperating temperature:5��C ~ +50��CSize:92*73*27mmWeight:133g Package Includes: 1 X 3.5�� Security Tester1 X Power Adapter1 X Power Cable1 X AV Cable2 X BNC to RCA Converter1 X User Manual