RAM introduced white LEDs to the hobby industry in 1998. Since that time we have produced thousands of systems that have set the standard for high brightness, ruggedness and long battery life. The small circuit is powered for 4 to 10 hours by a 1.5 ounce, 9 volt alkaline battery depending on the number of LEDs in the system. 6 and 7 cell nicads can also be used. All the systems ( except RAM 132, 3 MM) use 5 MM White and ultra brite LEDs with colored lense caps where appropriate. Power switches are also part of many of the systems. The systems are light and compact, completely assembled in the U.S.A. and ready for installation.