Heiniger Style Midi Trimmer. The Heiniger Style Midi Trimmer is a high quality, precision Swiss engineered trimmer perfect for use on your dog or horse. This quiet trimmer features a lightweight ergonomic design making it so easy to use and perfect for trimming all those tricky areas. The Style Midi Trimmer provides 100 minutes of operating time from 60 minutes of charge. The adjustable snap on comb allows a cut length of 3-6mm. Clipping Speed â€\\\" 2400 dbs/min