Name: Intelligent Acoustic Wave Electric Toothbrush Model: C Series Main Power: 2.5W Battery: Lithium-ion Battery 18500/1200mAh 3.7V Charging Seat Input: 5V DC 500mA Material for Handle: Plastic Material for Toothbrush Head: Bamboo Storage and Recharge of the Toothbrush 1. For first-time use or if the toothbrush has not been used for over 3 months, charge the device before use. 2. The recommended operating temperature for charging is between 5C and 35C. Temperatures outside this range may affect charging performance. 3. To maintain optimal battery performance, it is advised to charge the toothbrush regularly. 4. It is normal for the device temperature to rise slightly during use and charging. Charging Instructions 1. Charging time is approximately 7 hours. 2. When charging begins, the indicator light will flash and then turn off after 3 seconds, entering charging status. 3. Charging is complete when the green indicator light turns on and remains steady. 4. Low battery alert: The yellow indicator light will flicker. Press the on/off button; the yellow light will stop flickering after 2 seconds. 5. Battery information: - All five LED lights on: Battery capacity over 90% - Four lights on: Battery capacity over 75% - Three lights on: Battery capacity over 50% - Two lights on: Battery capacity over 25% - One light on: Battery capacity over 15% - Yellow light on: Battery capacity below 10%; the light will blink four times as a reminder.