Design features: * Miniaturization design, input & output port using horizontal row. * Dual battery input design, automatic switching and balancing between batteries. * 4 current outputs, support 4 channel servos direct connection. * Plug and play. No need to weld the connectors. * Internal dual input voltage monitor for low voltage with memory function. * Support HV servos (7.4V), output voltage is switchable. * Includes FSS-3, the failure safety switch with status indicator (#46813), VR Pro Duo also supports FSS-4 lightweight switch(#46814). * Equipped with heat sink and external cooling fan (#46816). * Support up to 10pcs of 30kg digital servo. * Can be used on the largest 13KG model aircraft, eg.120CC * Gasoline Powered Aircraft. Electrical Features: * Linear regulator, no interference, low ripple. * The input power uses simulated diode dual redundancy power supply. * Double MosFET output, independent linear control IC, high output current capability. * Low dropout design makes fully use of the cell's capacity, especially on HV mode. * Large heat sink, good heat dissipation and high overload capacity. * Built-in MCU precisely controls FSS-3 and internal voltage. * Fail safe design, ensuring Non-stop work. * SMT process, ensureing the quality. * Input & output port all use high quality tantalum capacitors. * Dualsky Shanghai factory assembled, fully tested before dispatch. Electrical specs: * Input voltage: DC5.3V -8.4V, MAX10V (2S Li-ion-LiPo). * Output voltage: 5V, 6V, 7.4V (Switchable, Tolerance + 3%). * Output current: DC 0 -15A (Vin-Vout =1V). * Minimum differential voltage: < 0.3V. * Power effect: %0.3. * Voltage effect: %0.3. * Output ripple: < 2mV. * Size: 63mmX32mmX18mm. * Weight: 62g (including duo input wires).