"Gemini by Lovense is a set of vibrating, adjustable, app-controlled unisex nipple clamps. Adjustable pinch strength and the strength of vibrations make this sex toy a must for both people who love soft teasing, and more extreme sexual games. Included optional necklace and bra clip make Gemini easy to wear. Use a bra clip during public play or easily carry it around using the necklace. Materials Body-Safe Silicone/ABS Plastic/PC Plastic/Nylon Weight 65.6g Battery Li-Ion Rechargeable Usage Times Level 1 | 120 Minutes Level 2 | 95 Minutes Level 3 85 Minutes Charging 65 Minutes Standby up to 120 Hours Waterproof IPX6 Water-Resistant"