Key Features 1. 180°anti collision: The parking lock has flexible design and self-protection function. It can rotate back and forth to protect itselffrom external collision.And the parking lock will alarm. 2. High pressure resistance: Curved disign and thicker steel shell make it have a good performance in pressureresistance. The parking lock can endure a pressure of 5t without damage. 3. High capacity dry battery: Use dry battery instead of accumulator. It is easy to maintain.Replaceable D Battery. 4. Long remote control distance: Adopt loading coil to increase signal intensity. It has stronger penetration. The effective distance is 20 meters. You will feel easy and comfortable to control it. 5. Anti-pilfering: Mounting bolting inside makes it impossible to be stolen. 6. Automatic alarming system: Alarmed barrier.Fully waterproof with alarming apparatus, alarm sound for unauthorized operation or exterior force trying to put the arm down.Alarmed barrier takes about 5 seconds to rise and fall after pressing the remote.Force the barrier down and a loud alarm will sound.The alarm makes this parking lock tamper and theft proof. 7. Good running in bad weather conditions. Specifications Material: Cold rolled steel Voltage: DC 6V Remote control distance: 15 m Lifting time: 4 s Lifting Height: 400mm (15.75 inch) Folded thickness: 75 mm (3 inch) Static current: 1 MA Working current: 2.5 A Environment temperature: -30 ~ 60 °C Waterproof level: IP67 Package Includes 1 x Parking Lock 2 x Remote Controllers 2 x Keys 3 x 3" (76.2MM) Bolts