... -closing Supports the infrared photo cell for anti-bumping function (optional)Supports the external and internal vehicle loop detector (optional)Traffic ... Running time: 1, 3, and 6sBoom type: straightMaximum boom length: 3, 4.5, and 6mBoom dimension: 45 x 80mmBoom weight: 3, 4 ... .5, and 6kgVoltage: 220V ±10%, 110V ±10% ...