GS Extreme 2.0 delivers 3 products in 1; its like having Bluetooth ear buds, noise isolation headphones and electronic earmuffs all in one product. Make these your Go to Ears!Features : SportFit Ear Hooks Rechargeable Lithium Battery on Lanyard Up to 25 Hours Hearing Enhancement and Protection Run Time 6.5 Premium Dynamic Speaker Bluetooth Mode 19-29 dB SNR / 13-23 dB NRR