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 25dB 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. - Bluetooth compatible with mobile devices - 25dB NRR -High quality stereo sound - Separate left and right channel earplugs -Dual microphones for directional clarity - Illuminated on/off Indicator -Auto-shutoff (4 hours without touching controls) - Multiple size tips for custom fit -Rechargeable storage case