The Swiss Tech Tonen offers exceptional hearing protection with its 13-level Real Active Listening (RAL) mode that enhances sound up to 25dB and a sound-activated compression function that auto-suppresses damaging high-level noise. With a 40-hour USB-C rechargeable lithium-ion battery that fully charges in just 2.5 hours, it provides extended use and convenience. Featuring Bluetooth for seamless music streaming and phone calls, it boasts a Noise Reduction Rating (NRR) of 25dB. The 2-channel separated volume controls for media and hearing enhancement functions, along with an auto shut-off function to save battery life, ensure optimal performance. Additionally, covered input and output ports protect against dust and debris, while low-profile comfort ear cups, a padded comfort headband, and a premium rubberized coating deliver superior comfort and durability. Perfect for hunting, heavy machinery work and working out.