Features: 1. Advanced manual release; 2. Boom can rise and fall on left/right sides by setting on the same machine; 3. No need to change the balance spring when changing the booms shorter than 6 meters; 4. Adopt the 3rd generation WEJOIN machine core; 5. Support the INFRARED PHOTOCELL for anti-bumping function (optional); 6. Support the external and internal VEHIVLE LOOP DETECTOR (optional); 7. Auto warming up, suitable for cold environment; 8. Auto closing; 9. RS485 communication module (optional); 10. Thermal radiates rapidly, no thermal protection; 11. Die-casting aluminums alloy machine core and advanced double-stage driving motor effectively solve the problem of machanism block up; 12. Special art and craft makes out the most modernized and fashionable housing; 13. Safety photo electricity limit switch.