1. Sound Amplify: Ear earmuffs built in directional microphone amplifies range commands to a safe 82 decibels, providing hearing for you. 2. Comfortable Wear: Hearing earmuffs adopted ergonomic headband design, with soft padding to reduce the pressure on your head for superior comfort. 3. Folding Storage: Sound earmuffs adopted compact folding design for easy storage, which is convenient to put in a range bag, backpack or briefcase. 4. Ear : Safety ear muffs can prevent harmful sounds from entering your ears, specially designed foam ear pads to provide you with maximum . 5. Widely Use: Noise reduction ear muffs ideal for sports events, woodworking projects and lawn care, extremely suitable for operating machinery. Spec: Item Type: Noise Reduction Ear Muffs Material: ABS Battery: 2 x AAA Batteries(Not Included) Use: For sports events, studying, woodworking projects and lawn care, extremely suitable for operating machinery or landscaping business. How to Use: 1. Stretch the headband to its full size, place it on your head and make the earmuffs cover your ears.2. Adjust the size of the headband and the height of the earmuffs until the headband supports the earmuffs and the ears feel comfortable. 3. The cushion of the earmuffs should fit tightly to the head.4. Adjust the headband to ensure the correct tightness and effectively isolate the noise. packing list: 1 x Noise Reduction Earmuff 1 x Connecting Line 1 x Instruction