Body-to-body blue vibrator ring, whisper quiet. Features auto-vibrating – vibrates on contact, dual rings, and is wireless. Batteries included. Product Features Wireless stimulator/erection enhancer is self-contained and activates on contact Whisper quiet Unscented TPR Batteries included (1 watch, 2 included) 3.5?x 1?/9 cm x 3 cm (ring)