1A: one pc 2-wires actuator with metals
2A: one pc 2-wires actuator without metals
3A: 5-wires actuator with metals
4A: 5-wires actuator without metals
5A1: (single control)R/C + (3+1) remote controller, two transmitters, 3pcs 2-wires one pc 5-wires actuators and some metals  
5A2: (double control)R/C + (2+2) remote controller two transmitters, 2pcs 2-wires, 2pcs 5-wires actuators and some metals
7A1: (single control) 3pcs 2-wires 1pc 5-wires actuators and with some metals  
7A2: (double control) 2pcs 2-wires 2pcs 5-wires actuators and with some metals

Technical data:
1) Working voltage: DC 12V??2V
2) Working voltage range: 11-14.5V
3) Standard working electric current: <5A
4) Flex range: 18??1mm
5) Static thrust: 2.2kg
6) Dynamic wallop: 4.5kg
7) Control time: 0.2S
8) Working life: more than 100,000 cycles
9) Storage temperature: -30 ~ 65oC
10) Installation hole size: 58.0??0.5mm