[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 in residential or office environments. [Slim and Sleek Design]: With a thickness of only 18mm, this intercom is thinner than many comparable models. Its high-gloss UV-treated surface and plastic + silicone button structure provide a refined tactile experience. [Intelligent and User-Friendly]: Features include a talk indicator light and battery status display for easy monitoring. Includes a dedicated charging dock for convenient and consistent power management. [High-Capacity Battery]: Equipped with an 1800mAh polymer lithium battery, the device supports approximately one week of typical use (5 calls per day, 30 seconds each). Standby time is up to 5 days. [Versatile and Adjustable]: Offers two operating frequencies (462MHz and 434MHz) to help reduce interference. Includes 38 ringtones and three adjustable volume levels for both ringtone and call audio. Note: This system requires two units to operate and is not designed for single-unit use. 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 areas; 20–100 meters through walls or floors Operating Frequencies: 462MHz and 434MHz Battery Life: Approximately one week per full charge under typical usage