[Long-Range Communication]: This wireless two-way intercom system offers reliable communication with a tested range of up to 300 meters. It maintains clear audio transmission through walls and floors, supporting communication across multiple levels. [Slim and Sleek Design]: With a profile of only 18mm, this intercom features a compact form factor. The high-gloss UV-treated surface and plastic + silicone button structure provide a refined tactile experience. [Intelligent and User-Friendly]: Designed for ease of use, it includes visual indicators for talk status and battery level. A dedicated charging dock enables convenient and consistent power management. [High-Capacity Battery]: Equipped with an 1800mAh polymer lithium battery, the device supports approximately one week of typical usage (5 calls per day, 30 seconds each). Standby time is up to 5 days. [Versatile and Adjustable]: Offers dual frequency options (462MHz and 434MHz) to help minimize interference. Includes 38 ringtones and three adjustable volume levels for both ringtones and call audio. Note: Both units must be used together as a pair. Power Supply: 1800mAh polymer lithium battery 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 and floors (levels 1–8) Operating Frequency: 462MHz and 434MHz Operating Time: Up to 1 week per charge Charging Time: Approximately 5 hours Standby Time: Up to 5 days Audio Adjustment