A hair styling comb comprising a body having a handle, a release cone, and a guide measuring system that are combined to precisely separate hair in orderly rows for braiding. A Vehicle Logic Unit authenticates an operator of the transit vehicle, upon start-up of the transit vehicle and the VLU. The DPF after-treatment operator interface provides multiple status indications to the operator. The first regional part separates a trailing edge of the magnetic pole from the trailing shield, and the second regional part separates the pair of side shields from the trailing shield. The gate signal generation unit enters the leakage current protection or a quasi-resonant mode according to the corresponding time out signal.