Firstly ,Please check whether you connect led strip correctly.If the connection is wrong, the light strip will always be on.
Second ,The motion sensor led strip only work at Whole dark environment.So please test at night .
Type: 12V 2835 LED Strip With Motion Sensor and 2A Power Adapter
LEDs Type: 2835SMD
Light Color: White / Warm White
Color Temperation: White (6000k-6500K); Warm White( 2700K-3500K)
Sensing Distance: 1 m - 3 m
LED Strip Length: 1M/2M/3M/4M/5M
LEDs QTY: 60leds/M
Waterproof Grade: IP65