Features: 1. Adds light to plants, stipulate photosynthesis, helps them absorb nutrients. 2. Helps accelerate the growth of indoor plants. 3. High intensity LED chips, energy saving and long service life. 4. Used to grow houseplants, vegetables, lettuce, tomatoes, herbs, etc. Ideal for use in indoor garden, indoor greenhouse. 5. Flexible arm for easily adjusting the light in any direction. Three timing function mode: 3/9/12 hours. Dimming function. Specifications: Power: 20W LED Quantity: 40 LED 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 (Power Adapter NOT Included) [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) How to Set The Timer 1.A short press to enter the 3H timing function,the indicator light flashes once in 5 seconds 2.Short press two times to enter the 9H timing function,the indicator light flashes two times in 5 seconds 3.Short press three times to enter the12H timing function,the indicator light flashes three times in 5 seconds 4. Short press four times to cancel the timing function WARM TIPS This is A ONE-WAY TIMER,user can set it up to turn off automatically after 3H/9H/12H, but have to turn it on manually every day. Would be better to keep the distance between the light and plant about 70cm. Generally this grow light should be turned on for 5 hours one time, 2 times every day. Give plants enough water and rest time in the dark，they need rest too. Keep the lamp away from rain and snow