Boston   chromatic clip tuner, with multi color display, auto power on/off

Boston   chromatic clip tuner (also G+B+U+V), with full color display, 430-450Hz

Boston   chromatic clip tuner (also G+B+U+V), with full color display, 430-450Hz, violin clip

Boston   clip on tuner pick-up, 90 cm. cable, standard 6.3 mm. jack plug

D'Addario Planet Waves   micro violin/ viola tuner by NS design, 410Hz to 480Hz calibration