Used for various stone carving, wood carving, olive stone carving, plastic carving, egg carving, glass carving, ceramic carving, drilling and various metal surface polishing, lettering, trimming, etc. Suitable for all kinds of DIY small hand carving, punching, nail polishing, polishing and other applications. Parameters; Type; E108 suitable for grinding head shank diameter; Depth of collet 3MM; 25 mm turn speed; Three power transmission rate: 5000 -- 10000 -- 18000; 10W service time; Three no-load operation more than 1 hour, if you need to use for a long time can be used while charging. Battery voltage; 4.2V battery capacity; 300 ma rechargeable electric; Fill 80% in 30 minutes and fill in 60 minutes. Heavy volume; 58 grams of precautions; Take out the electric mill from the packing box and check whether the accessories are complete. Check whether the electric mill and packaging are damaged. If the goods are damaged, please contact the seller in time. This model is small in power, non-professional electric grinding, suitable for small precision engraving and grinding field. Do not place the electric mill above 40 degrees. Notes for charging; The electric power of electric mill is about 50% when it leaves the factory, and it needs to be fully charged before the first use. The charging port is usB-type-C, which is the same as the charging port of Android smartphones. Please use standard USB charger or COMPUTER USB to charge the electric mill. Do not cover the items to ensure good heat dissipation. Power display: 1 lamp =30%; 2 lamp = 31-70%; 3 lamp = 71-100%; when fully charged, the electric mill will automatically turn off and off the lights. When it is idle and not in use, it should be fully charged and charged once every six months. Method of use; Install the grinding head; Put the grinding head into the collet and tighten the grinding head fastening screw with the matching hexagon socket wrench. Lightly press the power button once to enter 1 block work state speed 5000 RPM lightly press the power button once to enter again around 2 block work state speed 10000 RPM lightly press the power button once to enter again about three block work state speed 18000 RPM lightly press the power button once again enter the shutdown state, to use load display will display at any time according to the using situation, according to the load condition overload using a heavy load, overload display lights up for 2 seconds overload system will shutdown protection, if you want to continue to use can be used lightly press the power button boot again. According to the current situation of use, the user can grasp the load situation, please use in the overload range. Spare parts If additional spare parts are needed, please use the original products. We can supply you with high quality spare parts. 1. Grinding head 2, hexangular wrench 1, Grinding head fastening screw 2, 4, USB-- Type-C charging cable 5. Packing box Warranty Term the warranty period of this product is 1 year for the motor and circuit, and 3 months for the mechanical parts, which does not include the following points: 2. Damaged due to lack of daily maintenance. 3. Improper use and other man-made damage. 4. Improper transportation caused damage after the sale. 5. Products whose components have been modified, dismantled or repaired by illegal maintenance personnel. 6, natural disasters (fire, lightning, flood, etc.) and other irresistible factors damage. 7. Severe impact damage. 8. In order to avoid unnecessary disputes, please note that all repairs, maintenance and replacement of spare parts shall be paid separately by both parties. Repair or replacement of accessories within the warranty period, we will charge the corresponding maintenance fee. Troubleshooting problem could be the cause of the corrective action equipment cannot be started the battery run out of charge to send back to the manufacturer to replace the switch on/off switch failure replace grinding the effect not beautiful grinding head wear a foreign body grinding head grinding head attached clean grinding head grinding head without fastening to tighten the grinding head can\'t rechargeable battery charger line damage replacement battery line invalid replacement battery charger ningbo zhenhai Kang Run metal products co., LTD. Address: zhejiang ningbo zhenhai dumpling pillars of sichuan street road no. 188 by the dealer: electricity words: 15824270378, 15824278759,