Product Features Long Range Communication: Enjoy reliable communication over a range of up to 1000m/3280ft. Perfect for large homes, hotels, villas, factories, and hospitals. Maintain clear communication across multiple floors with ease. Includes intercom and battery light indicators for added convenience. Easy Installation & Use: No wiring or internet connection needed. Features a sleek design with a thickness of only 18mm, and a high-gloss UV surface treatment for durability and a premium feel. Customizable Ringtones & Volume: Choose from 38 ringtones to match your preference, with 3-level volume adjustment for both ringtones and call volume. Long Battery Life: The outdoor unit lasts about 8 months, and the indoor unit lasts about 3 days per charge. Indoor unit can be charged continuously on its base. Sturdy & Weatherproof: The outdoor unit is water-resistant with an IP54 rating and includes a rain cover. The indoor unit is not waterproof. Specifications Power Supply Method: Rechargeable lithium battery Working Temperature: -20°C to 55°C Transmission Distance: Up to 1000m/3280ft in open space and 20-100m/66-328ft through walls Working Frequency: B-gear 462MHz, A-gear 434MHz Charging Time: Approximately 5 hours for a full charge Ring Volume: 3-level adjustment Waterproof Grade: Outdoor Unit IP54, Indoor Unit None Battery Capacity: 3.7V/1800mAh Product Colors: White, Black (optional) Product Options: 1 Outdoor Unit with 1 or 2 Indoor Units Important Information The outdoor unit delays ringing for 30 seconds after call is terminated by pressing PTT on the indoor unit. If no response is heard from the indoor unit, re-pairing may be necessary. For matching, hold down the PTT key on the indoor unit until a white flash appears, then release. Note: The actual color may vary slightly due to display and lighting conditions. Package Includes 1 Outdoor Unit 1 Indoor Unit Instructions Screwdriver USB Data Cable Wall Tape