DUAL GRIT: Coarse 325 grit (45 micron) for quick edge setting; Extra fine 1200 grit (12 micron) for honing. Sharpen and Hone ALL HARD Material including High Speed Steel, Carbide, Ceramic & Cubic Boron Nitride. Sharpen dry. No messy oil or water needed.
Auto Quick Pairing: This ear buds adopts hall switch, after the first successful connection, you only need to open the charging case lid, the bluetooth earbuds will automatically power on and connect with your phone, with a range of up to 100 feet away
[Translucent Matte Back] The case back is coated with frosted material, comfortable in hand and resisting annoying smudges like fingerprints, oil residue. Also you can still admire the delicate logo of your device