Enhance your home security and convenience with this reliable Wireless Door Bell system, designed for easy installation and long-lasting performance. Crafted from high-quality ABS plastic, this doorbell set features an outdoor bell powered by 4 AAA batteries (not included) and an indoor bell powered via an external USB data cable, providing flexible power options to suit your needs. Engineered to comply with national regulations, this product ensures no harmful electromagnetic interference, making it safe and universally compatible worldwide. Key Features: · Reliable Wireless Transmission: Operating at 467.6375MHz frequency, the doorbell supports a maximum open distance of up to 200 meters (656.2 feet), ensuring clear signals even over long ranges. · Long Battery Life: The outdoor bell boasts low power consumption with a standby time of up to 4 months, minimizing the need for frequent battery replacements. · Clear and Adjustable Sound: Equipped with a large, adjustable speaker, the indoor bell delivers clear and crisp sound that can also function as a mobile intercom for convenient communication. · Easy Installation: The outdoor bell can be effortlessly mounted using the included adhesive tape, allowing quick setup without drilling or complex tools. · Flexible Pairing Capability: One outdoor bell can be paired with up to two indoor bells using a code-learning function, preventing interference and enabling simultaneous alerts in multiple locations. · Durable Construction: Made from premium ABS plastic, the doorbell is compact, aesthetically pleasing, and built to withstand everyday use. · Wide Operating Temperature Range: Both indoor and outdoor units operate efficiently between -20°C and 55°C, suitable for various environmental conditions. Specifications: · Item Type: Door Bell · Material: ABS Plastic · Color: As Pictures Shown Outdoor Bell: · Power Supply: 4 x AAA batteries (not included) · Working Frequency: 467.6375MHz · Transmission Distance: Approx. 200m / 656.2ft open area; 5-50m / 16.4-164ft with obstacles · Working Temperature: -20°C to 55°C · Waterproof Level: No waterproof function · Working Time: Up to 4 months standby Indoor Bell: · Power Supply: 5V 1A via USB data cable · Working Frequency: 467.6375MHz · Transmission Distance: Approx. 200m / 656.2ft open area; 5-50m / 16.4-164ft with obstacles · Working Temperature: -20°C to 55°C · Waterproof Level: No waterproof function Package Includes: · 1 x Outdoor Bell · 1 x Indoor Bell This wireless doorbell system combines convenience, long-range performance, and clear audio quality in a compact, easy-to-install design, making it an ideal choice for enhancing home or office entry notifications.