1. you can the on/off button to turn it on/off and change the mode, more convenient to use 2. with three modes to choose, no mater you want the sensor mode or the always light on mode, this solar light can meet your requirement Specification: Lamp power usage:5.5V 2.5W Battery:3.7 V 2000 mAH Lithium Expected battery charge time:6 hours LED quantity and type:48 x 2835 SMD Rated power:3.8W Lumens: 24 each, 450 total Colors: 6000 to 6500 K Mounting hole diameter: 38 cm Solar panel power: 5.5V 2.5W Solar panel conversion rate: 17% efficiency Solar panel life expectancy: 15 years Waterproofing: IP65 Color:White Material:ABS+PC Package Contents: 1 * Solar sensor lights 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.