Powerfull back massager

Gear level: 5 gears and above . Product Overview: Gear level: 5 gears and above Number of massage heads: 4 Battery life: 1-3h (inclusive) Built-in battery capacity: 2000mAh-4000mAh (inclusive) Whether built-in battery: built-in battery Noise: 36-45db Motor type: brushed motor Gear level: 5 gears and above Number of massage heads: 4 Battery life: 1-3h (inclusive). Features: High Quality, Durable, Affordable.