This electronic switch is used to control the sequence of electric retract from your transmitter gear channel switch. Also include a wheel brake module for JP Hobby. It is a replacement control box for the JP Hobby electric retracts. It will work with both sizes of the JP Hobby retracts and other retracts brands.
Serial JP Hobby ER-120 (12kg) Sizes: 52 x 32 x 21 mm Weight (gr): 50 gr Connection: JR / Graupner / Futaba