Speed adjustment tool (to be used with turntables with adjustable pitch control). On the opposite side of the Strobe is an alignment jig for aligning the cartridge in the correct position for minimum tracking distortion.

• Test turntable platter speed
• Tests 33-1/3 rpm, 45 rpm, and 78 rpm speeds
• Works on 50 Hz and 60 Hz
• Turntable strobe light required (not included)
• 'Flip side' diagram provides easy cartridge alignment