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 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, 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 capacitors. Color:As Shown Material:Plastic+Metal Package Contents: 1 * VR Pro DUO Linear Regulator set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.