-1 BRAND NEW Siemens LOTUS 23SP, 100% Digital, Dual Channel, Super High Power, Behind-the-Ear, hearing aid -1 User Manual -1 Siemens type 675 battery(Not include) -3 different size ear plugs to fit your ear -1 carrying case -1 Year Factory Warranty Use Method A: whistleWhen you first use hearing aids, maybe you can meet whistle. It is not a question of product quality but as the ear tip is small. The amplified sound is escaped from your ear and then amplified again. After many times amplified, become whistle. Please use larger size ear tip when you meet whistle. B: volume adjustmentYou can push the button of "+" and "-" to adjust volume according to your feeling C: program select Button control with two functions : Soft/Loud
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