Milwaukee L4RLEPB USB Rechargeable Hearing Assist Earplugs with Bluetooth Jobsite awareness provides controllable situational awareness, while reducing the intensity of loud external noises Digital Bluetooth 5.1 connects devices and allows listening to music/ podcast/ audio books/ media and accept/ talk on/ decline phone calls European Certified hearing protectors: EN 352-2:2020 (SNR silicone ear plugs = 26 dB; SNR Foam ear plugs = 32 dB); EN 352-7:2020; EN 352-9:2020; and EN 352-10:2020) Designed for on-the-job use, passive hearing protection is provided by silicone and foam ear tips The USB case battery provides up to 70 hours of run time using multiple in-case charges Up to 10 hours of run time on a single charge Small enough to not interfere with any PPE or hoods & hats