GS Extreme 2.0 delivers 3 products in 1; it’s like having Bluetooth ear buds noise isolation headphones and electronic earmuffs all in one product. Make these your new ‘Go to Ears’! – SportFit ear hooks to comfortably stay in your ear – Rechargeable lithium battery on lanyard – Up To 25 hours hearing enhancement & protection run time – Up To 120 hours standby time – Control sticks for Bluetooth and hearing & protection volume – SPECS – SOUND ENHANCEMENT & HEARING PROTECTION – 5.0 BLUETOOTH AUDIO FOR STUDIO QUALITY AUDIO & HANDS FREE COMMUNICATION – COMPRESSES LOUD SOUNDS AT 85 DB OR LOUDER – 6.5 PREMIUM DYNAMIC SPEAKER – 0 HZ-40000 HZ SOUND SPECTRUM – 19 DB SNR WITH SILICONE TIPS – 29 DB SNR WITH GENERAL FOAM TIPS – 29 DB SNR WITH MAX PROTECT FOAM TIPS