Press the button twice to power on, press and hold to power off. To change between modes (sensitive, white, clean) press and hold the button for 8 seconds. Brush teeth for 2 minutes, morning and evening. Be gentle - the sonic brush will do the hard work for you! Your toothbrush will buzz every 30 seconds as a reminder to change the area you're brushing. Allow the battery to run all the way down before first use, then recharge for 2 hours. When attaching the toothbrush head, leave a 1-2mm gap between the head and handle. Apply your desired amount of toothpaste. Turn the device on and brush! Brush for 2 minutes, changing between modes for optimal results. Power off before removing toothbrush head. Clean the toothbrush by running under water and wipe hand with a soft cloth to dry. Store well between uses.