Palm Power Micro Massager Key Chain from BMS Enterprises. You already love your full sized Palm Power, now you can take it on the go with Palm Power Micro! This fully functional vibrating massager is so compact that it fits easily in your pocket, purse or on your keychain. Key features: strong vibration. Long run time. Replaceable batteries. Micro Massager requires 2 LR44 cell batteries. Portable. Dimensions 2.5 inches by 0.75 inch.