- Oracle FrontDoor wireless doorbell and intercom starter kit - Truly wireless 1000ft. range - 2 Year battery life - Compatible with all Oracle intercoms - Designed for residential and commercial applications - Tolerates severe outdoor conditions of -40 degrees F to +85 degrees F and high humidity - Mounts on to any surface in a few seconds with provided 3M high strength tape, or can be mounted with screws - Waterproof, ice, and heat proof - Penetrates buildings with ease - Crystal clear, digitally secure connection - 900MHz Digital technology - Auto channel and frequency selection - No wires or wiring required - Intuitive, easy setup - Includes 1 FrontDoor intercom unit, 1 portable intercom, mounting screws and tape, telephone cord, antenna, and AC adapter - Intercom unit is gray