The Sperry West Spyder Fire Strobe Wireless Covert Color Camera with Receiver is a common sight in offices and industrial environments. It can transmit wirelessly through 1 or 2 walls, and has a maximum transmission range of 700' (line of sight). It can be adjusted to one of four channels, within the 2.4 GHz range. This helps limit potential interference.
Note! This device is for surveillance purposes only and cannot be used as a fire strobe.