The DC-310 is a 10 battery chargers for Guided Tour hand held or belt style transmitter / receivers mounted in a flight case. The charger is constructed of strong ABS material and has compartments to allow up to 2 hand held transmitters to be inserted into the pre moulded receptacles. Total 20 transmitters can be simultaneously charged. Charging of the batteries will automatically take place and depending on the battery charge state will take up to 16 hours for a full charge. 2 red / green coloured indicators are used for each battery compartment giving visual indication of On and charge cycles. Suitable for use with NiMh batteries, Switched mode power supply allowing mains power operation 110 – 230VAC .