The Model CAN 2700 canary system from Wireless Innovations is a keychain signal detector that allows users to pick up on devices like cell phones, ideal for quick and easy detention cell inspections. Designed for convenience, the mini-sized system delivers vibrations and LED alerts when an item has been detected. Available with an option of eight selectable integrated frequency bands with up to 20 decibels per band, the product may be used with an antenna for more accurate signals and findings. A special version designed for prisons uses a patent pending geolocation self-calibrating software to precisely locate phones and automatically report data. Additional options are also available for data logging with time stamp and signal strength.