Pure Charge & Go 3Nx is a Receiver in Canal type rechargeable digital hearing aid by Signia Siemens. Pure Charge & Go 3Nx has 24 Channel digital processing with Rechargeable Li-ion battery.. It covers Mild high frequency hearing loss to Severe hearing loss. MPO (dBSPL) upto 130. Fitting range upto 1115dB. Pure Charge & Go 3Nx features includes : Own Voice Processing (OVP), Revolutionary Dual Processing, Ultra HD e2e Binaural Link, Made for iPhone, Direct Streaming from iPhone select iOS devices, 3D Classifier (performance level 3), HD Spatial, Extended Dynamic Range, Frequency Compression, Narrow Directionality (performance level 3), Sound Smoothing (1 step), Speech & Noise management (3 steps), Adaptive Streaming Volume, Advance Feedback Cancellation, Learning classes (1 situation), Tinnitus Noiser, IP68 Rating - water, dust and shock resistance hearing aid.