Hush 2 - The most versatile vibrating butt plug - EVER! Designed for your comfort. 100% Silicone. Spirals on the neck trap lube near your sphincter - making it easy to remove after an extended session! Neck was carefully designed and tested to ensure it STAYS PUT during use. Optimized base is comfortable, but flared enough to ensure it's safe. Nearly silent when inserted. 45.5 db highest level. Compatible With: iPhone/iPad Air/iPad Mini/iPod Touch iOS 10.0 and later. Android 4.3 and later (with Bluetooth 4.0 enabled) Mac (with Bluetooth 4.0 enabled) Windows PC (needs a Lovense USB Bluetooth Adapter to connect). IPX7 Waterproof. USB rechargeable - 3 - 3.8 hours of continuous use.