Fangrui Product Details This Product Solves The Above Problems, And Is Installed Inside The Rear Of The Car, And Emits Microwaves Downward For Detection.if The Sensor Detects An Effective Kick In The Sensing Area, It Outputs A Corresponding Level Signal According To The Signal Strength. Control The Opening Of The Tail Box. Normal Mode: Approach The Foot Of The Bumper Sensing Area And Then Leave The Bumper Sensing Area. When This Action Is Completed, A Trigger Signal Be Generated. Abnormal Patterns: Stairs, Stones, Branches, Rough Roads, Plastic Bottles, Car Wash, Etc., No Trigger Signal Is Generated. Type:trunk Boot Kick Sensor Fitment Type:direct Install New. Quality Products. Installation Notes: 1. Find The Proper Position On The Rear Guard Of The Vehicle. 2. Wipe The Installation Position Of The Sensor. 3. Peel Off The Double-sided Tape Of The Sensor (the Side Of The Double-sided Tape Is The Detection ) Facing The Ground 4. Connect The Sensor Firmly To The Rear Protective Plate (inside Of The Bumper)! The Sensing Should A