Walker's Silencer Bluetooth 2.0 Electronic Earplugs - Bluetooth wireless electronic earbuds with a free control app that allows for complete control of your Silencer BT Models from your SmartPhone. Bluetooth S.O: Improved Battery Life And Wide Connection Range More Stable Left/Right Earbud Connection Touch Button Controls SAC (Sound Activated Compression) Dynamic Wind Noise Reduction Variable Gunshot Suppression Voice Prompts Auto Shut Off 24NRR Includes: USB Charging Dock With Integrated Rechargeable Lithium Battery, 3 Sizes Of Sure-Lock Fins And Foam Tips (SM/MD/LG), Cleaning Brush And Micro USB Cable