<b>Any problem or inquires for your purchase, please do not hesitate to contact us directly via emails(Open "Your Account" on Amazon - find "Your Orders" - find your this order ID - Click "Contact Seller") or via our after-sale service mailbox provided on the user manual to get a 100% satisfactory solution.</b></br></br> <b>Technical Specifications:</b></br> Power: 3.7V - 8W</br> Input: 100-240V 50/60Hz</br> Output: DC5V 1A</br> Adjustable Guide Comb Length: 8 length settings, 3~22mm (3mm, 6mm, 9mm, 12mm, 15mm, 18mm, 20mm, 22mm)</br> Battery: Lithium Battery</br> Dispaly Screen: LED Screen</br> Cleaning Brush Length: 3.15inch/8cm</br> Comb Length: 6.89inch/17.5cm</br> USB Charging Cable Length: 51.18inch/130cm</br> Charging Method: USB recharging or connect with a wall adapter<b> (Included)</b></br> Charging Time: 90 mins</br> Working Time: 60 mins continuous use</br></br> <b>Package Included:</b></br> Electric Hair Clippers x 1</br> USB Charging Cable x 1</br> USB Wall Charger x 1</br> Cleaning Brush x 1</br> Comb x 1</br> Carry Bag x 1</br> User Manual x 1<b>(Please read user manual carefully before using!)</b></br>