[ Excellent Signal ] Clear sound quality and long range. An enhanced signal with 5280 feet range helps ensure crisp sound quality. The most trusted wireless intercom system for home! [ 10 Channel and 3 Digital Code ] 10 channels and 3 digital codes in a secure wireless intercom system. Features an enhanced anti-interference and can work with other intercoms with the same digital channel code! [ Easy to Use with Detailed Manual ] Features include Monitor, Talk, VOX (Voice Operated Exchange), Group, and Calling function. Increase/lower volume too! This intercom system is easier to use than others with user-friendly multi-functions and included step-by-step instructions! [ Supported by Power Bank for Outdoor ] This device is compatible with Power Bank (5V 1A) making it easy to take these intercoms any place you want. Use For : Home, Office, Business, Outdoor Activities(use Power Bank,Power bank not included)