Product Information: 1. Size: 7*9*6cm 2. Weight: about 150 grams 3. Material: ABS Note: This model is not packed, does not have a battery, you need to buy a 9V battery Instructions: 1. Remove the battery compartment cover (2+1). 2. Put a 9V alkaline battery in the battery compartment. 3. Insert the cable into the slot of the control box. 4. Insert the rubber nose clip into the nostril and make sure that the two micro-light sources on the top enter the nose 1 to 1.5 cm. Press the start button. 5. The green light should illuminate continuously instead of flashing. A flashing light indicates an operational failure (low battery or cable is not properly inserted into the control box). 6. The green light automatically turns off after the treatment. (4 minutes and a half)