This is the ElectriFly Silver Series 25 amp Brushless Electronic Speed Control.
            Great for medium sized, high performance airplanes.
           Delivering 25A of continuous current with a built-in
           Battery Eliminator Circuit which can handle 2A, this
              ESC is very simple to use and very affordable.

• Length: 1.58" (40mm)
• Width: 1.02" (26mm)
• Height: .31" (8mm)
• Weight: .92oz (26g)
• Input Voltage: 7-12 cells NiCd/NiMH
• 3-4 cells LiPo (20V input w/o BEC)
• Output Current: 25A continuous maximum
• 28A surge maximum
• Max Output Power: 250 watts
• ON-resistance: .15 ohms
• Operating frequency: 8.5kHz
• BEC: 5V/2A
• Low Voltage Cutoff: Battery voltage x .67
• Thermal Cutoff: 230°F (110°C)
• Timing Angle: 12°
• Brake: ON/OFF