Four DC 24V Thrust 450 lbs Electric Linear Actuators Sync Control Kit Choose the actuator stroke::600 mm and the contactor 1 is

and the contactor 1 is disconnected

you can install an external antenna to the receiver

such as model C-4 (100 Meter / 300 feet range)

Package Include:12 x Ignition controller: S1PS1-DC06-ANT11 x Remote control: CV-12L or CB-12L1 x User manualFeature:Wireless control

2-2) Control linear actuator by manual buttons in receiver:

Four DC 24V Thrust 450 lbs Electric Linear Actuators Sync Control Kit Choose the actuator stroke::600 mm and the contactor 1 isNote: 1) This product does not contain a mounting brackets. It compatible Bracket A and Bracket C, please click here to choose and buy. 2) If you need a 24V 10A power supply for this kit, please click here to buy. 3) If you need external limit switch for linear actuator, please click here to choose and buy. 4) If you want to extend the power cable of linear actuator, please click here to choose and buy. Package Include: 4 x Electric Linear Actuator A