Features: Long-Range Communication: Our wireless two-way intercom system is designed for long-range communication, with a tested range of up to 300 meters. It can penetrate walls and floors, allowing for clear communication from the 1st to the 8th floor. This makes it an ideal solution for elderly care, home, or office communication. Slim and Sleek Design: With a thickness of only 18mm, our intercom system is slimmer than similar products on the market which are usually over 22mm thick. The slim design, combined with a high-gloss UV-treated surface and a plastic + silicone button structure, offers a superior tactile experience. Intelligent and User-Friendly: Our intercom system features a talk light and battery light display for easy monitoring. It also comes with a charging dock for convenient charging, ensuring the device is always powered and ready for use. High-Capacity Battery: Powered by a 1800mAh polymer lithium battery, our intercom system can last for about a week with normal use (5 calls per day, 30 seconds per call). It also features a standby time of 3-5 days, making it a reliable communication tool for your home or office. Versatile and Adjustable: Our intercom system offers two frequency options (462MHz and 434MHz) to help reduce interference. It also features 38 ringtone options and 3 adjustable volume levels for both ringtones and call volume. Please note that the two devices must be used together and cannot be used separately. Specifications: Power Supply Method: Polymer lithium battery 1800mAh Charging Input: DC5V/1A Working Temperature: -20°C to 55°C Transmission Distance: Up to 1000 meters in open space, 20-100 meters through partition walls, floors 1-8 Working Frequency: B-gear frequency 462MHz, A-gear frequency 434MHz Working Time: Up to 1 week on a single charge (under normal usage) Charging Time: Approximately 5 hours when fully discharged Standby Time: 3-5 days Sound Adjustment: 3-level adjustable Ringtones: 38 options Ring Volume: 3-level adjustment (using standby machine volume key) Call Volume: 3-level adjustment (using volume key during call) Color: Black, White (optional) Product Size: 11.6 x 5.6 x 1.8 cm / 4.6 x 2.2 x 0.7 inch Charging Dock Size: 7 x 5.6 x 2.9 cm / 2.8 x 2.2 x 1.1 inch Note: Two units must be used together and cannot operate independently Note: Due to differences in display screens and lighting effects, the actual color of the item may vary slightly from the images shown. Packing List: 2 x Indoor Intercom Units 2 x Charging Docks 1 x 2.0 Small Screwdriver 1 x Charging Station Cable 1 x Host Charging Cable 1 x User Manual 1 x Strong Adhesive Pad