[Long-Range Communication]: Our wireless two-way intercom system offers reliable communication with a tested range of up to 300 meters. It maintains clear audio through walls and floors, supporting use across multiple levels. Suitable for home, office, or caregiving applications. [Slim and Sleek Design]: At just 18mm thick, this intercom is thinner than many comparable models. It features a high-gloss UV-treated surface and a plastic + silicone button design for comfortable handling. [Intelligent and User-Friendly]: Includes visual indicators for talk status and battery level. Comes with a dedicated charging dock for convenient recharging. [High-Capacity Battery]: Equipped with an 1800mAh polymer lithium battery. Provides approximately one week of typical use (5 calls per day, 30 seconds each) and up to 5 days of standby time. [Versatile and Adjustable]: Supports two operating frequencies (462MHz and 434MHz) to help reduce interference. Offers 38 ringtones and 3 adjustable volume levels for both ringtone and call audio. Note: Two units are required for operation; individual use is not supported. Power Supply: 1800mAh polymer lithium battery Charging Input: DC 5V / 1A Operating Temperature: -20°C to 55°C Transmission Range: Up to 1000 meters in open space; 20–100 meters through walls or floors Operating Frequencies: 462MHz and 434MHz Battery Life: Approximately one week per full charge under typical usage