[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 typically 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 user-friendly functions including a talk light and battery light display for easy monitoring. It comes with a charging dock for convenient charging, ensuring the device remains powered and ready for use. [High-Capacity Battery]: Powered by a 1800mAh polymer lithium battery, the intercom system lasts approximately one week under normal use (5 calls per day, 1 minute per call). It also offers a standby time of 3–5 days, making it a reliable communication tool for home or office environments. [Versatile and Adjustable]: The system supports two frequency options (462MHz and 434MHz) to help reduce interference. It includes 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 are not functional when used separately. Power Supply Method: Polymer lithium battery 1800mAh Battery Input: DC5V/1A Working Temperature: -20°C to 55°C Transmission Distance: Approximately 1000 meters in open space, 20–100 meters through walls Compatible Floors: 1–8 Working Frequency: B-gear frequency 462MHz, A-gear frequency 434MHz Working Time: Up to 1 week on a single charge Charging Time: Approximately 5 hours Standby Time: 3–5 days Sound Adjustment: 3 levels