The Ultimate 12-28v ChargerThe DualMicro is the top of the line DC charger for 12-28 volt systems. The USB ports on this device feature Rapid Charge technology, which allows you to fully charge 2 full-sized tablet devices in no time at all. The DualMicro supports 24 volt systems that typically output a charge of 28 volts, and are found in many aircraft. Just keep the DualMicro in your flight bag and you will always have all of the power that you need when you need it. Works with all tablets, ADS-B receivers, GPS units, iPhones, smartphones and any other USB powered device.