Another option for identifying friend from foe especially in low light conditions as this EMG Airsoft Nation IFF Arm Band comes with LED available at Evike.com... "The EMG IFF LED Arm Band was developed as an additional aid to help fields and players to differentiate teams by color to quickly identify allies and opposing forces. The arm band features a convenient toggle switch which cycles through 4 different LED colors (Red, Green, Blue, and Magenta).