Doctor Love Zinger Vibrating Sleeve. Batteries and pouch included. 11, 000 vibrations per minute. On and off switch. Easy. Comfortable. One size fits most. Sleeve measures 2.25 inches wide by 3 inches in length. Top ring measures 1.25 inches in diameter. Bottom ring is 2 inches in diameter. Rings are textured for added stimulation. Please note shown on dildo, not included. Phthalate free materials Thermoplastic Elastomers TPE cage, ABS plastic bullet vibrator. Vibrating Cage requires 3 LR44 batteries. Batteries are included.