The eMERGE clipper was built for fitters requiring high speed, high power, cord/cordless flexibility and a comfortable shape to increase control and reduce hand strain. 1-Speed: 4,500 strokes per minute Cord/Cordless Contoured Body with Finger Grooves 1.5 hours of runtime on a 60-minute charge Equipped with Andis ceramicEDGE size 10 blade: runs cooler and stays sharper longer LED battery status indicator turns from white to red when battery level is below 10%.