Features: brand new and high quality This hearing device is designed for old people or people with hearing problems. Very convenient and easy to use for seniors,adults. This hearing aid is small in size, convenient and comfortable to wear. It can be used up to 35 hours after charging for 1.5-2 hours, you don'for t have to buy battery replacements anymore. The hearing aid can be used charged with USB,you can charge with charge bank,charger and computer. Simply for touch of the hearing aids lightly with your finger for 3 seconds to switch it on,and 5 seconds to off. Specifications: Material:Plastic+Metal Color:Red,Blue Size:3.8x2.7cm/1.5x1.06in Battery Model : Rechargeable Maximum output:≥120dB Frequency Range：250Hz-3800Hz EQ Input Noise(dB) ≤10dB Operating Voltage:1.5V Working Current:≤4mA Standby Time:35Hours Charging Time:1.5-2Hours Package Includes: 1xHearing Aid 1xUSB Adapter 3xEarplugs 1xCharger 1xStorage Box 1xCleaning Brush 1xManual note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.