Baby clippers which is better

Baby clippers which is better?
(1) appearance, light weight, flexible operation, labor-saving, small vibration, low noise, Special Hair clippers for kids.
(2) blade hardness, scissors sharp blade, shear light freely, without pulling hair and clip hair phenomenon.
(3) is not less than the amplitude of the blade moves 1.5mm. Lower blade to smooth contact surface. Blade should have coarse, medium, fine, and other specifications.
(4) requires its electrical properties should be particularly strict, insulation must be good and reliable, there should be no leakage phenomenon.
(5) use,noise generally should not be greater than 70dB, ie silent hair clippers, should not people have annoying noise uneasy feeling.
(6) When the 10% voltage fluctuations soil, can be used normally.
(7) of the plastic and electrical parts of the surface for a bright color and smooth, no pitting, stripes, bubbles, deformation phenomena.
(8) on the blade from the enclosure gap should not exceed 0.75mm, the upper and lower blade should be neat, there should be no skew phenomenon.
(9) vertical slot at the back blade clear, alveolar center, unnotched and obvious defects, sharp teeth to smooth.
(10) The metal parts (except for the upper and lower blade) surface should corrosion protection layer, fine gloss coating should not have spots, pitting, pinholes, bubbles, shelling and open at the end and other defects.
(11) Full load continuous 8min, close 4min, then continuous use 8min.
(12) under the blade should not rise higher than 15 ℃, while the temperature of the solenoid should not be higher than 65 ℃.