Cellular Pen 3-in-1 is equipped with an LED light that flashes whenever your phone receives/sends a signal (must be within 0-3 feet of your phone). Cellular Pen 3-in-1 is also equipped with a UV light can be used as a flashlight or currency counterfeit detector.

Cellular Pen 3-in-1 is designed to operate on GSM, TDMA or IDEN networks. Phone carriers in the USA include: AT&T Wireless, Boost Mobile, Cellular One, Cingular, Nextel, T-Mobile and Triton PCS. May Not work properly with phones on a CDMA network.

Requires 3 AG3 Battery (included)