- It uses a sound wave frequency that oscillates more than 300 times per second, which is more effective and gentle on deep skin cleansing 2. 4 different replacement heads, long soft brush for daily deep cleaning, silicone brush for gentle exfoliation and steel ball massage head 3. 3 speeds are adjustable to meet different needs 4. Built-in lithium battery, it takes 2 hours to fully charge, and the battery life is about 3 weeks 5. IPX7 full body waterproof 6. Power supply mode: USB charging cable 7. Battery capacity: 350mah 8. Voltage: 3.7V 9. Product size: 16 x 4.5 x 4.5cm (host only) packing list: 1 x host 1 x USB charging cable 4 x brush head 1 x manual