The E-Max Shadows are Bluetooth rechargeable electronic ear plugs designed to go where you go play all your music and keep your ears protected. High quality stereo sound is Bluetooth compatible with your mobile device and comes with a 23dB noise reduction rating. Dual microphones provide directional clarity and come equipped with easy to use touch volume controls. The charging case comes with an integrated lithium battery. 23db noise reduction Battery Life: 5 Hours per charge Includes a case that can recharge the earplugs 4-5 times Bluetooth Pairing with phones or other capable devices for music or phone calls Multiple ear tips included Adjustable ambient sound amplification Great for other noise reduction such as lawnmowers Track Page Views With Auctiva's Counter