Features: 3.5-inch Color Screen & Night Vision: High-resolution display with 2X digital zoom and crystal-clear night vision that automatically activates in the dark. Private & Secure Connection: 2.4 GHz wireless connection technology, no access to the insecure internet. Long Range: Up to 50 meters indoors and 300 meters outdoors. Two-Way Talk-back: Long-distance communication with clear sound quality. Multiple Views: Include up to 4 cameras for all-around views. ECO Mode: Reduce power consumption during quiet moments. The units only connect when the baby makes a sound. Long Battery Life: Provides cordless use for up to 8 hours (in ECO mode). Temperature Detection: Temperature sensor tracks the real-time temperature in the baby's room. Alarm: Set a timer (2h/4h/6h) to feed the baby or change a diaper. Specifications: Screen Size: 3.5-inch LCD Screen Frequency: 2.4 GHz FHSS Transmission Power: 18 dBm Max Parent Unit Battery: 3.7 V, 950 mAh