Features: 1.Made of high  quality material, durable and not easy to fade. 2.Grind as fine or as coarse as you need in seconds, glass viewing window design allows you to check the grinding progress. 3.RPM: 24000.Can shred herbs in 10s 4.High Capacity Battery Power: Super-high 1100 mAh capacity herb grinder can be used 300 times for an average of 30 days of usage per charge. 5.If you have any questions, you can contact us.We wil try our best to help you.    Notice: Please allow 1-3cm deviation due to manual measurement Actual color may be slightly different from the image due to different monitor and light effect Description: Material:Metal Size:28x154mm Package List: 1x Grinder