SPECIFICTIONS ✅Frequency: 2.4 GHZ. ✅Modulation: GFSK. ✅LCD: 5.0" inch. ✅Operation range: Up to 900 ft (straight line and open space). ✅Power adapter: Input: 100-240VAC 50/60Hz, Output: 5V,1A. ✅Rechargeable battery: Model: 503450 3.7V 3000mAh. ✅Image sensor type: 1/6.5: color CMOS IR LED type: 940 nm. ✅Operation Environment: indoor use only; Temperature: 32-104°F ✅Humidity: 5%-90%rh (relative humidity).