Razor GWP-SLCR2-BT, Silencer BT 2.0 Ear Buds SKU: GWP-SLCR2-BT. Description: Bluetooth wireless electronic earbuds with a free control app that allows for complete control of your Silencer BT Models from your SmartPhone. O: Improved Battery Life and Wide Connection Range Much 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 Micro USB Cable.