[USB Charging]---Our automatic gravity pepper grinder features a built-in Type C rechargeable battery with a charging base and utilizes advanced charging technology. More cost-effective to maintain than other battery-powered salt grinders on the market now. Only a USB charging cable is required, no need to waste money on buying batteries anymore. [Adjustable Coarseness]---These USB rechargeable salt and pepper grinders allow you to adjust the coarseness from fine to coarse by rotating the adjustable knob on top. Rotate clockwise for fine particles and counterclockwise to grind coarse particles. The adjustable coarseness system lets you choose the perfect grind. [One-Hand Operation]---A power switch controls the entire electric salt grinder, and an indicator light illuminates to show the grinder is in standby mode. Simply press the button and tilt the electric salt grinder to start automatic grinding. After use, press the power switch to turn off the grinder (the indicator light will turn off). This user-friendly design helps prevent accidental power consumption. [Wide Application]---Use it to grind sea salt, pepper, black pepper, red, white, or garlic pepper, or other spices. Suitable not only for the kitchen but also perfect for outdoor picnics and barbecues. An ideal gift for family members and friends. Please note: Salt and pepper are not included in the package. [High-Quality Material]---This adjustable salt grinder is made of high-quality material, eliminating the risk of glass breakage and ensuring extreme durability. The top-quality ceramic rotor blade provides long-lasting durability and can grind even the hardest peppercorns, sea salt, or other spices. The transparent bottle is made of thickened material for easy spice level observation. Material: plastic Color: black Package Contents: 2 x Grinder 1 x Charging Base 1 x Charging Cable 1 x Cleaning Brush Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to differ slightly from the real thing. The allowable measurement error is +/- 1-3 cm.