Small electric mill power display with locked rotor protection gear adjustment, compact and lightweight

Usage method： Press once within 2 seconds for 1st gear, press twice for 2nd gear, press three times for 3rd gear

                            Press the shutdown button after more than 2 seconds of startup

                            3rd speed regulation: 1st gear 5000 rpm, 2nd gear 10000 rpm, 3rd gear 18000 rpm

                            Built in lithium battery with 300MAH charging cycle for 800 times