Specification: product name: pet hair trimmer color: gold rated power : 4w voltage : 5v battery capacity: 800mah charging time: 2 hours usage time : 180 minute power supply: usb charging limit comb size: 3mm, 6mm, 9mm, 12mm feature: -usb charging design, convenient to find a device to charge it. -with 4 limit combs, freely adjust the length of the trimmed hair. -applicable usage: suitable for home diy, pet grooming shop and so on.