The SQ-50-V quartz metronome is an upgrade from the SQ50 and features new look, easy operation tempo dial, adjustable volume, two selectable click tones (high and low), and two tone generators (A and Bb). Dial-in virtually perfect tempo settings and an A=440 tone for tuning. Tempo range from 40-208BPM can be set easily from the 39-position rotary dial. A red LED can be selected for a visual beat or combined with a click sound for visual and audible beat-keeping. Includes earphone jack.