Description JP Hobby Sequencer Retract Box ER-120 V1 Landing Gear with Break Module 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. Specifications: Input voltage: 7.4V to 8.4V (2 cells lipo) Size: 52 x 32 x 21 mm Weight: 50 gr Note: Version 2 closes the doors when the gear is down while Version 1 keep the doors open