The voltage display for the starter and supply battery (5-15 V) and the level indicator for the fresh water and waste water tank (in 4 steps) is provided by a pointer instrument, which is automatically illuminated when queried. Main switch 12 V for central disconnection of the loads. Pump switch with indicator light (LED). Reserve switch for individual self occupancy. Optical deep discharge warning for supply battery. Additionally with 2nd indicating instrument Measuring range: ± 25 Ampere to check the current taken or fed in.