1. Main function: Visual + PIR Auto-Detection + SD card slot + Video Recording + Photo shooting + Removable Li-battery + 27 kinds of OSD languages2. TFT LCD display size: 2.8inch3. Easy to operate and install4. PIR sensor automatically video recording and photo shooting5. Infrared detection can be turned on or off6. Built-in 256M memory, Support SD card up to 32GB(not included)7. Record the date, time, the video length8. Video format: JPEG, MP49. Outdoor unit: High resolution 300K pixels10. 3X digital zoom, video can be playback on the viewer11. No radiation, Automatic power saving mode12. Dimensions: Indoor unit: 138mm*103mm*25mm, Outdoor unit size: 18mm*Dia.50mm13. Door Thickness suited: 35-105mm, Door peephole size: Dia.15mm14. Package contents: 1x indoor host, 1x outdoor host, 1x mounting plate, 1x Power adaptor, 1x 1800mAh Lithium battery, 1x Tightening tool, 1x manual host, 1x mounting plate, 1x tightening tool, 1x manual