Dual match the left and right channels in a stereo record groove for outstanding channel separation and extended frequency response. Stylus traces record grooves with accuracy, resulting in nuanced audio reproduction that elliptical and conical styli simply can't match. Stylus's multilevel shape also wears other stylus, while reducing the wear on your records. Made of high quality materials, solid, wear- and for long time using. Easy installation. Perfect needle stylus replacement for record player. Red diamond cue to Vinyle LP record player, cue to 78 RPM record player Needle pressure: 5 grams (4-6 grams) Output voltage: (1kHz=3.54cm/sec)=250mV Channel distortion: (1kHz) = 3dB Channel separation: (1kHz) = 15dB Frequency response: 80-10000 Hz (+/-7dB) colour:Black Material:Ruby sapphire Package Contents: 1 x red sapphire stylus Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.