Advantages: 1. LCD display screen for 24 hours moniting. 2. Transmits distance reach 100 meters in the open place. 3. Automatic infrared LED for 3-5 meters night vision 4. Both camera and monitor are built in li-batteries which can be recharge. Description 1. 4 channels image output selectable 2. 1.5" and 1.8" TFT LCD for your choose, the image can be download it to computer or TV by USB cable 3. Both of camera and monitor build in Li-batteries (can be recharge) 4. Voice and Brightness can be adjustable 5. Automatic infrared LED for 3-5 meters night vision 6. Transmits distance reach 100 meters in the open place 7. One camera can connect with four monitors at the same time, this function the same to the monitor 8. All kinds of cameras for your choose 9. Output voltage of charger: 5V DC , input voltage of charger:100-240AC 10. Charge time of battery :2-3 hours, battery working time :2-3 hours where to use it ? It specially can be used in bab