Achieve better control over the tone of each frequency, resulting in warm and generous mid-frequencies, full and dynamic low-frequencies, and bright yet smooth high-frequencies. Crafted from high-quality materials, ensuring strength, wear resistance, and durability. Features dual ruby and sapphire needles: ruby for LP records and sapphire for 78 RPM records. Structure: Polarity: When the needle tip is horizontal (left + right), the output voltage phase for the left channel (L) and right channel (R) should be the same. Needle: Ruby + Sapphire Output Voltage: At a frequency F of 1 kHz, when the vibration V of the sound groove in the L or R direction is 3.54 CM/S or the vibration of the transverse sound groove is 5 CM/S, the output voltage should be within +/- 4DB relative to the specified value (250 MV) (i.e., within the range of 200~300 MV). Tracking Force: When testing the tracking and electrical parameters of the turntable, the tracking force should be measured within the range of 40 +/- 10 MN. Note! Small item, keep out of reach of children to prevent accidental ingestion. Color: Black Material: Plastic Package Contents: 1 * Needle Only the above package contents are included; other products in the image are not. Note: Light and different displays may cause the color of the product in the picture to be slightly different from the real thing. The allowed measurement error is +/- 1-3 cm.