WUZHOU High precision and accurate stylus gauge for accurate stylus force adjustment. Accurate stylus force is important for ensuring the playback result and life of your valuable records and cartidge. Too high stylus force results in shortened record/stylus life while too low stylus force result in easy mistracking and both of the cases with come into poor audio performance. Power source: button battery No battery provided Delivery Quantity: 1pc, Package Contents: Only the above package contents, excluding other products. Dimensions: 96x43x20mm (Reminder: The size is measured manually, please allow 1-2 cm measurement error) Colour: Black (Due to different monitors and lighting effects, the actual color of the item may be slightly different from the color shown on the picture.)