• Descriptions: Continues use time long, during the day, don't worry he will not be without electricity. Choose the suitable for your earplugs, and then switch to ON open state, and then to turn the volume switch to your dB. When you sleep or take a shower when you put him down, will hit the OFF switch off state, so can long use time. Do not place the product in water or moist places. Specifications: Material: Plastic Color: skin color Size: 14.5*6*10.5cm Model Number: A02 Signal to Noise Ration: Less Than 28db Plug Type: US Frequency: 100-4000Hz Voltage: 1.2V Gain: 30db Working Current: Less Than 3mA Distortion: Less Than 6% Charging time: approx. 3 hours Working time: 8-10 hours Package includes: 1 x Hearing Aid 1 x Charger(EU/US Plug optional) 3 x Silicone Earplugs 1 x Manual Notes: 1.The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2.Please allow slight deviation for the measurement data.