Features of Magnetic Cartridge Stylus: Fixed hole distance of recording head: 13 mm (measuring center distance of two holes). There are four wiring marks at the end of the singing head: R+, R-, L-, L-. Generally, the wiring color of the end of the record player is: R+ = red, R- = green, L+ = white, L- = blue. Recommended tracking force range: 1.5g2g, adjustable according to personal preference. Features of Turntable Headshell (4 Pin Contacts): Compatible with phono turntable headshells for Technics and other turntables. Suitable for S-shaped or straight tonearms. Plated 4-pin contacts. Includes four color-coded OFC (oxygen-free copper) soft lead wires with gold-plated terminals for improved sound clarity. Each terminal is enclosed in a clear sleeve. Model Number: Headshell Motor: For turntable Speeds: 33, 45, 78 RPM Stylus Type: Magnetic Cartridge Stylus Color: Black Material: Metal + Plastic Package Contents: 1 x Magnetic Cartridge Stylus with LP Vinyl Needle 1 x Replacement Phono Turntable Headshell