【High-Definition Display】 5-inch LCD screen with 1080x1920 resolution for crystal-clear video monitoring of your baby. 【Two-Way Communication】 Built-in microphone and speaker enable seamless two-way audio interaction with your child. 【Night Vision】 Infrared LEDs provide clear visibility up to 15 feet (5 meters) in complete darkness. 【Temperature Monitoring】 Real-time temperature and humidity display with high/low alerts for optimal nursery conditions. 【Multi-Camera Support】 Expandable system allows connection of up to 4 cameras for comprehensive coverage. 【Long-Range Transmission】 Secure 2.4GHz FHSS technology ensures reliable connection up to 850 feet (260 meters) outdoors. 【Extended Battery Life】 5000mAh rechargeable battery in the monitor for prolonged cord-free operation. Specifications: Frequency: 2.4GHz FHSS Modulation Type: GFSK Data Rate: 4 Mbps Transmission Distance: Indoor up to 131ft (40m); Outdoor up to 850ft (260m, open air, line of sight) Operating Temperature: Indoor use only, 0–40°C; Humidity 5%–90% RH Storage Environment: -20°C to 70°C; Humidity 5%–95% RH Monitor: LCD Size: 5'' Resolution Supported: 1080 x 1920 Consumption Current: 400mA Battery: 5000mAh Power Supply: 5V, 1500mA Dimensions (L x W x H): 168.7 x 90.8 x 19.9mm Weight: 249.5g Camera: Image Sensor: GC2083 / GC2053 CMOS Resolution Supported: 1080P Consumption Current: 280mA Night Vision Distance: 15ft (5m) Power Supply: 5V, 1500mA Dimensions (L x W x H): 105.5 x 90.25 x 75mm