black ISOtunes PRO 2.0 -Noise Isolating Bluetooth Earbuds, 27 dB NRR, 16 Hr Batt. Enjoy your favorite music even in noisy environments with the ISOtunes PRO 2.0 Noise-Isolating Bluetooth Earbuds. The tips are made of comfortable memory foam that fits snugly inside the ears and muffles sounds (up to a 27 dB rating). They also pair with any compatible Bluetooth device, such as a smartphone, for wireless streaming up to 16 hours on a fully charged battery. In addition, these headphones allow for clear phone conversations through the noise-cancelling mic. These are OSHA-compliant headphones, making them safe and suitable for busy professional workshops. ISOtunes PRO 2.0 Noise Isolating Bluetooth Earbuds, 27 dB Noise-Reduction Rating, 16-Hour Battery, Noise Cancelling Mic, OSHA Compliant Earplug Headphones: Noise-blocking eartips made with comfortable and ergonomic memory foam Comfort-fit memory wire IP67 Rated for Water, Sweat, and Dust proof Lightweight and comfortable Built-in volume and microphone controls Noise-reduction headphones deliver up to 16 hours of talk or music Microphone reduces background noise for clear calls