1Be Connected with People Chosgo K19S hearing aid is supper effective in hearing assistance for mild to moderate hearing loss. It will help the users to be connected again in conversation, watching TV, on the phone, or in any other situation. 2Ear Protection Output Automatic sound gain control output for hearing protection, wont suffer from sudden loud noise. 3Smaller & Light Weighting These hearing aids are much smaller than other CIC hearing amplifiers. It feels more comfortable in the ear canal, and no burden for the ears for a long time using. Great for people wearing glasses or masks. 4Fast Recharging & Upgraded Charger Place the device in the charging base for around 2.5-3 hours of charging, you will get 22 hours using duration. It applies lithium-ion batteries instead of earlier batteries to ensure stable charging and longer use life.