Tascam TC-1S solar-powered tuner, chromatic tuner, Battery is charged by built-in solar cells, Additional quick charge option via USB connector (for charging only), Tuning: 12-note equal temperament, Detection range: A0 - C8, Didplay modes: Meter, animated strobe, needle, fine, Calibration range: 437 - 446 Hz, 1-Hz intervals, Input: Built-in mic omnidirectional mono 6.3-mm standard mono jack for instrument or microphone, USB connector: Mini-B type (only for charging the battery), External dimensions (W x H x D): 96 x 18 x 40 mm.