The HBT-61 Industrial Bluetooth Headset is designed for listen-only applications. Ideal for use with test & measurement equipment, vibration and machinery analyzers, cell phones, tablets, computers virtually any industrial smart device. High fidelity earphones provide superior audio and OSHA-compliant hearing protection. And the HBT-61 headset provides up to 80 hours of continuous use on a full charge, so it's always ready to work when you are.Rugged construction for reliable performanceVolume control switch on headset dome provides volume adjustment of paired device to preferred listening levelComfort-gel ear seals for all-day comfortBehind-the-head style for use with hard hats and protective headgearUSB charging cord includedUp to 80 hours of continuous use without rechargingFCC, IC, CE approvedOne Year WarrantyCODE: 42021G-04