Vesper is world's first USB rechargeable - multi=speed vibrator necklace. Vesper is a solid 316 stainless steel pendant with a nickel-free plated cap and matching 26 stainless steel chain. As a vibrator it has 4 speeds - low.medium. high. and pulsing. Its clean. sleek aesthetics make for both a subtle addition to your outfit and a standalone statement piece. USB cabled and storage pouch included. Splash-proof. Not for insertion. External use only.