| Features: Physical Principle, Safe And Environmentally Friendly, More Assured And Healthier. No Smell, More Suitable For Children, Women Pregnant, The Elderly, Pets, Etc. Lightweight And Comfortable To Wear, You Can Carry It Anywhere. Adjustable Length, You Can Adjust It According To Your Needs. Waterproof And Dustproof, Don'T Fear The Rainy Day. Easy Disassembly, Convenient To Charge And Disassemble. Large Lithium Battery Built-In Capacity, Supports Long Time Use. Can Be Worn Indoors And Outdoors, Such As The Sea, Parks, Camping, Hiking, Fishing, Etc. Features: Model: M30 Material: Silicone + Plastic Color: Black, White, Pink, Blue (Optional) Working Frequency: 20?Hz ~ 100?Khz Charging Time: … | |