Frequently bought together:
Description
1. Material: ABS
2. Display mode: digital
3. Working principle: micro current vibration
4. Power supply mode: USB charging / built-in battery power supply
5. Built-in battery: 150 mAh lithium battery
6. Dimensions: 7.5 x 5.5 cm
7. Three levels of strength, which can be adjusted according to their own needs
8. USB charging, convenient to travel