JETI SPIN 99 PRO OPTO ESC, handled by K&S. Used in F3A aircraft. - Model: K&S SPIN 99 PRO OPTO - Voltage Range: 14-36 NiXX / 4-12 LiXX / 12-50V - Cooling: With heat sink Control BOX and Japanese instruction manual included. Two are shown in the image, but one is in working condition and the other is for disassembly and research. No claims and no returns accepted.