First E-grinder in the world.2. Powerful auto grinder with one 18400 Li-ion batteries.3. Reversal function without stucking by too much loose leaf.4. Stainless steel screen, with 4 layer Auto-grinder.5. One power button design, easy to operate.Product Specification:Battery capacity 900mahWorking voltage: 6.7v-8.4vSize: φ62*124mmColor: Black,Red,Green,BlueWeight: 330gHow to use:Firstly, Click the power button for 5 times to turn it on.Secondly, hold the power button only for 2 seconds and then theLED light will flash 3 times which indicate the device start to grind.Thirdly, click the power button 1 time to stop grinding.You canhold the power button for recycling the auto grinder. To savepower, we advice customers had better turn off the device if youdon’t need it. Click the power button 5 times to turn it off.How to charge:Please always charge the device with the charger coming in thecase.Plug into the device to charge, the lights will turn Red to indicatethe device under charging. When the led light turn to Greenwhich means the device is fully charged.Charging time: 2-3hoursUSB Charger:5V/1A USB ChargerHow to cleaning:Before cleaning,Make sure the device is stopped working, thentake off the bottom three covers and put into water to clean it.Make sure it must be dry enough before you load them to thedevice again.Warning:1. This device can not be applied to soybeans, coffeebeans and other hard shell products. only suitable forleaves, flowers products usage.2. Do not expose the device to external heat about 500°F.3. Do not punture or incineate the device.4. Do not dismantle the device.5. Do not drop or cruch the device.6. Do not touch the grinder when it working.7. Please keep it dry, never let the device submerget in thewater.8. Please always keep the device far away from thechildren reach.9. Please always keep the device away from extremesources of heat.10. Please turn off the device when no using it.This Kit Includes:1x Atman Mini E- Grinder1x Atman charger1x user manual1x gift boxWarranty InformationATMAN MINI Hummer comes with 1 year warranty.