Gems are a girl's best friend! Beautiful, quiet, wireless ticklers may be worn anywhere! This is a "must have" accessory. Attach to any garment with their patented non-damaging magnetic clasp. 25% more power EZ push button control Waterproof Silicone and ABS 1.75" x .75"/4 cm x 2 cm US Pat # 6-991-598 B2 Batteries included