LW-F01 Hearing Aid Mini Invisible Noise Cancelling CIC Adjustable Volume Control Small Sound Amplifier Senior Hearing Aids FOR FOUR LISTENING ENVIRONMENTS: (Normal, Noisy, Outdoor, Meeting) - Ensure that you can hear at your best no matter what situation you are in. EASY USE AND COMFORTABLE FEATURE: Our device is easy, durable, and comfortable to wear. This item contains only one device. WHY CHOOSE : Low-power consumption,Smart chip, noise reduction--you can hear the birds and enjoy your life again LIGHT AS A FEATHER - Small and light weight, you can easily forget you are wearing it. YOU CAN DIRECTLY CONTROL THE VOLUME BY YOUR FINGERNAILS , push button and wheeling for adjust volume ,BUT THIS IS MIGHT NOT BE FOR YOU IF YOU ARE HAVING A PROBLEM OPERATE SMALL ITEMS. ProductInformation BrandName ProductName Inner ear hearing aids Model No. LW-F01 Color Fleshcolor Material Plastic Host Size 2.2cmx1.4cmx0.9cm Net Weight 0.1kg Groweight 0.3kg Category Customized Battery 312 Calibration Automatic Frequency range 200Hz~6200Hz Working current 1.36mA Compreion rising time 48ms Equivalent input noise 27.6dB What's in the box: -- 1* LEFT Device -- 3* Sizes of Closed Ear Domes (S,M,L,) -- 1*User Instruction Manual -- 1* A312 Zinc Air Battery -- 1* Cleaning Brush --1*Wax Guard and Tool