ISOtunes PRO 2.0 Noise Isolating Bluetooth Earbuds is a redesigned, more durable, and longer lasting version of the ISOtunes PRO. With an IP67 rating, they are virtually dust and waterproof, able to withstand the harshest of environments. OSHA-compliant, with ISOtunes SafeMax ™ Technology to limit the volume to a safe, approved 85dB. This means you can listen for hours without risking the health and safety of your hearing. Tested and approved in accordance with ANSI, OSHA and CSA standards.