The Razor XV is a non-intrusive neck worn design with flat, no-tangle cables. The free control app allows for complete control of your razor XV from your SmartPhone.Features: RETRACTABLE DIGITAL EAR BUDS BLUETOOTH CONNECTIVITY RECHARGEABLE LITHIUM BATTERY HI-GAIN OMNIDIRECTIONAL MICROPHONES FOR CLEAR SOUND ENHANCEMENT EARBUDS IN IMPROVED POSITION FOR LESS CORD INTERFERENCE HD WALKER?S IN EARBUDS FOR WIDE RANGE AUDIO QUALITY 3 PAIRS OF FOAM TIPS ? (S / M / L) INCLUDED INTEGRATED MICRO USB PORT MICRO USB CHARGING CABLE INCLUDED 4 FREQUENCY MODES: UNIVERSAL, SPEECH CLARITY. HI-FREQUENCY AND POWER BOOST INDEPENDENT VOLUME CONTROL