Bamboo Electric Toothbrush with Nylon Bristles - Biodegradable, Natural, Eco-Friendly, Compostable, Vegan, Reusable Name: Intelligent acoustic wave electric toothbrush Model: C series Main power: 2.5W Battery: lithium-ion battery 18500/1200mAh 3.7v Charging base input: 5v DC 500mA Toothbrush storage and charging: 1 For the first use, as with newly purchased products, and if you have not used it for 3 months or more, you must charge it considering the remaining power. 2 The suitable temperature is between 5 degrees and 35 degrees. If the temperature is higher or lower, it may cause the charger to fail to charge normally or not to charge at all. 3 To maintain sufficient battery, it is recommended that you charge twice separately to save charging time. 4 It is normal for the machine temperature to rise during use and charging. Charging instructions 1 Charging time approximately 7 hours 2 The charging status indicator flashes and turns off after 3 seconds, after which it enters the charging status. 3 Charging is complete when the green indicator light is on constantly. 4 Low battery warning when the yellow indicator flashes. Press the power button and the yellow light turns off after flashing for 2 seconds. 5 Battery information: all five 5 LED lights on at the same time means the capacity is over 90%; if there are 4 lights, the capacity is over 75%; if there are 3 lights on, the capacity is over 50%; 2 lights on, the capacity is over 25%; 1 light on, the capacity is over 15%. If the yellow light is on, it means the capacity is below 10%, and it will flash 4 times as a reminder.