The Essential Bullet 3.5 inches Rechargeable Purple by Powerbullet. An Essential item for your collection, this rechargeable bullet has a Powerbullet motor with deep, powerful vibrations. Each package includes a convenient matte storage case and USB recharging cord. With 9 different functions, and a long lasting battery the Essential bullet is a necessity! Specifications: material ABS Plastic. Powered by: Rechargeable Lithium Polymer 350mah 3.7 Volt Battery, charger included. Size 3.5 inches in length.