Battery: Non-removable 3.7 V lithium-ion (DC), 800 mAh. Full charge time: 4 h. Power:
0.5 W. Noise level (at 0.3 m): ≤60 dB. Body protection degree: IPX7. Stiffness of the bristles:
soft. Number of operation modes: 3. Dimensions of the brush with head: 21 mm × 208 mm