Size Name:10W Features: 10W 20LED Four Heads Plant Grow Light Desk Clip Indoor Plants Flower Lamp Adds light to plants, stipulate photosynthesis, helps them absorb nutrients. Helps accelerate the growth of indoor plants. High intensity LED chips, energy saving and long service life. Used to grow houseplants, vegetables, lettuce,tomatoes, herbs, etc. Ideal for use in indoor garden, indoor greenhouse. Flexible arm for easily adjusting the light in any direction. Three timing function mode: 3/9/12 hours Dimming function Specifications: Power: 10W LED quantity: 20LED Voltage: AC 110V Material: Plastic Light Arm Length: approx. 14.5 inch Light strip length: approx. 9.64 inch Suitable for desk thickness: less than 2.5 inch Package Contents: 1 x LED Plant Grow Light 1 x User Manual 1 x Power adapter [IMPORTANT INFORMATION] The input voltage to the USB Adapter should be 110-240V. Keep the lamp away from rain and snow. [INSTRUCTIONS] 1.Press the power button to turn ON/OFF 2.Press the circulation button to adjust the brightness (9 levels) 3.Press the switch button to select red light,blue light or red&blue light 4.Press the timing button to set timers. Red means timer of 3 hours, blue 9 hours,red&blue 12 hours. 5.Please let the lamp rest for a few minutes after lighting for 5 hours. You can fill light 1-3 times a day 6.Stronger metal clip is convenient to help you install it any place you want 7. You can use USB connector to plug into a wall outlet or an USB interface.(USB adapter is offered)