Quake is an adjustable dual vibrator which can be customized to a wide range of vibration levels. Our app allows you to choose a power level which matches your individual needs. Program 3 Steady Levels Up to 10 Patterns. 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 - 1.5 2 hours of continuous use. Dimensions : in specifications (photo) One Year Warranty.