B SP Li is a superpower device for severe to profound hearing loss, which has been improved to make it a more effortless experience. Rechargeable Li-ion batteries remove the need to replace batteries and provide 88 hours of runtime, while enabling an IP 68 water and dust rating for peace of mind. Meanwhile, First Fit 48 Channels ensures each users’ hearing thresholds are accurately reflected in the fitting of the device, ensuring comfort from day one.