World's first app-controlled vibrating nipple clamps. Adjustable clamping force design (tightening the screw loosens the clamping force) Included bra clip and necklace for increased stability and public play wear. The bra clip is more suitable for public play. The necklace is more suitable for scenarios where you are naked or not wearing a bra, such as cam models. Customizable light color for the Lovense logo via Lovense app settings. Small discreet design suitable for a variety of situations such as public play, camming, solo play, foreplay and sex. Product Details: Materials: Body-Safe Silicone/ABS Plastic/PC Plastic/Nylon Sound-activated vibrations Sync to music Charging: 65 Minutes Use Time: up to 120 Minutes Standby: up to 120 Hours Waterproof: IPX6 Water-Resistant Weight: 65.6 g One Year Warranty Compatible With: iPhone/iPad/iPod Touch iOS 11.0 and later. Android 5.0 and later (with Bluetooth 4.0 enabled) Mac (with Bluetooth 4.0 enabled) Windows PC (needs a Lovense USB Bluetooth Adapter to connect)