General description The Wireless Doorbell features an intelligent design with intercom lighting and power display, making operation straightforward. It offers a wireless range of approximately 1000 meters without the need for internet or wiring, ensuring easy installation and use. This doorbell is suitable for various applications, including homes, hotels, villas, factories, and hospitals. Technical specifications Material: ABS Outdoor Doorbell Battery: 2 x Rechargeable Lithium Battery 2000mAh (built-in) Working Temperature: -20℃ to 55℃ Wireless Distance: 1000m (Barrier Free) / 20-50m (Barrier) Wireless Frequency: 410-490MHz Working Hours: More than 8 months (outdoor unit), about 1 week (indoor unit) Waterproof Grade: IP54 (outdoor unit) Product Size (Outdoor): Approx. 121.5 x 61.5 x 313 mm / 4.8 x 2.4 x 1.2 in Product Size (Indoor): Approx. 125 x 70 x 56 mm / 4.9 x 2.8 x 2.2 in Compatibility and accessories Includes: 1 x Outdoor Machine, 1 x Indoor Machine, 1 x Charging Base, 2 x USB