1. Small design, easy to carry; 2. Two-way intercom; 3. Temperature monitoring; 4. Built-in music camera; 5. Automatic night vision 6. Digital signal transmission, stable without interference; 7. High contrast 2" color LCD monitor 8. Long battery life (up to 8 hours in voice command mode) 9. Multilingual (English, French, Spanish, Italian, German) GENERAL FEATURES Transmission frequency: ISM 2400 ~ 2483.5 MHz Transmit Power: 17 dBm Clear Effective Range: 160ft/50m indoor/850ft/260m outdoor, line of sight Spread Spectrum: AFH and TDMA Modulation Mode: GFSK Operating Temperature operating: 14 ~ 122 Fahrenheit/- 10 ~ +50 Celsius Operating humidity: < 85% MONITOR LCD screen size: 2.0" Resolution charge: 220 x 176 Receive sensitivity: -90 dBm Current of consumption (max.): 150mA Battery: Li-polymer / 400mAh Power supply: DC 5V/500mA Dimensions (W x H x D): 63 mm x 126 mm x 27 mm Weight: 0.08 kg