1. Millimeter Wave Version: PIR Infrared + 24GHZ Millimeter Wave Module + Light Sensor Three-In-One, 2. Can Detect Movement, Micro-Movement, And Static State. 3. Powered By 2 AAA Batteries (Not Included) 4. Can Be Used For About 8 Months. 5. Can Be Installed With Double-Sided Tape. Ready To Install. Type: Intelligent Sensing Version: Millimeter Wave Version( PIR Infrared + 24GHZ Millimeter Wave Module + Light Sensor 3 In 1) Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Not Affect The Use Colour:As Shown Material:ABS Package Contents: 1 x 3 In 1 Human Presence Sensor 1 x English Instruction Manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.