Intercom control box without loudspeakers and microphone. One single driver/co-driver volume control. Powered by two 9V PP3 battery (not supplied) or by car battery using JA/851 cable - can be fixed to rollbar and dashboard. Can be used with loudspeakers and microphone kit JA/849, JA/854E or headseats JA/850. DIMENSIONS: 125 x 60 x 35 mm. NEW COMPONENTS FOR IMPROVED SOUND QUALITY.