Dial down damaging noises with these electronic ear defenders from 3M. They use Bluetooth MultiPoint technology to connect to one or two external devices, expanding your communication capabilities. A push-to-listen feature lets you tune into sounds around you without removing the protectors. An auto-power-off function helps conserve battery life by shutting your headset down after four hours of inactivity. To safeguard against corrosion caused by sweat, the electronic components are on the outside of the cup.

• Noise-cancelling boom microphone ensures clear speech transmission even in loud surroundings
• Battery life of up to 70 hours delivers long-lasting performance
• SNR of 30dB for reliable protection against hazardous sound levels

• Construction sites
• Oil and gas industry
• Transportation facilities

This device comes with two NiMH AA batteries and a battery charger so you never run out of juice.