1. Stimulate muscle by a simple relaxing electronic impulse2. Gradual release muscle pain3. Improve blood circulation4. Recovery from fatigue5. Help fat exercise， burn and decompose6. Safe and convenient， quick and quiet7. Compact size and can be used anywhere and anytime8. 4 LED lights: L1， L2， L3， L49. 10 intensity options and 6 working mode options Specifications:1. Powered by: 2 CR2032 Batteries (included)2. Material: Metal3. Color: Pink， Silver4. Dimensions: 4.06 x 2.99 inch / 10.3 x 7.6cm5. Weight: 2.12 oz/ 60 gPackage Includes:1 x Butterfly Massager1 x User Manual