Check the listing for details. Battery/Voltage controller MT USG 40. Condition: New. Listed at 75.00 USD. Is connected between the battery and 12 V consumer. Protects battery as well as consumer from harmful undervoltage (consumer off at 10.7 V) and the connected consumer from harmful overvoltage (off at 15.5 V).MT USG 40: With a separate switching output it is remote controllable and therefore usable as main control (all consumers off/on)Switching Current Durance/Short: 40 A / 60 AMT USG 120: Function principle like MT USG 40, however with far higher switching voltage. In addition, an interior control can be plugged in, with which the vehicle can be made non-electric any time (battery main control).Switching Current Durance/Short: 120 A / 200 AOne item was used for testing, but working properly. If you buy all 3 - I will give a big discount for the used one. Just contact me first.