The ultimate 5-in-one guitar tool. Fast, easy string changes and quick, accurate tuning, all in one tool. The Pro-Winder Tuner incorporates a dual-mode strobe/sweep chromatic tuner and condenser mic with the D'Addario (formerly Planet Waves) Pro-Winder multi-tool. The multi-tool includes a winder, cutter, string stretcher, and bridge pin puller. In the tuner's strobe mode, the played note lights up in green while red LEDs chase around the rotary wheel, which will slow down then stop when you're in tune. The LEDs chase in counter-clockwise direction when you are flat and clockwise when you are sharp.