Purchased new and used primarily indoors. The LCD display, button operations, etc. all function normally. Clip attachment is also not a problem. "D'Addario NS Micro Headstock Tuner PW-CT-12" This is a clip-on tuner that attaches to the top or back of a guitar headstock. Compatible with: Guitar / Bass Frequency: 410-480Hz Measurement: Chromatic Function ①: Auto power off Function ②: Inversion function Function ③: Metronome (only included in older models) This product is an older model with a two-color green/red LCD display. It is not the current color. #Guitar #Tuner #DAddario #DAddario