Radians R3700 Bluetooth Quad Electronic Earmuff Pewter/Black Amplifies environmental sounds for enchanced hearing;Four microphones;Bluetooth connectivity compatible with most smart devices;3.5 mm sterio input jack and patch cable (included) enable playback;NRR 24 dBtable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; } Item Category Code: 3700 Product Group Code: 3700B Pack Size: 1 Inactive: No