EXCEPTIONAL BASS RESPONSE - Experience big bass response with Edifier DUAL BATTERY FOR LONGER LIFE - With double the batteries get up to 8 hour of active battery life WATERPROOF IN UP TO 3 FEET OF WATER - Earphones are encased with IPX7 waterproof shell BLUETOOTH v4.1 aptX CODEC - Listen to lossless wireless audio with aptX codec 1-YEAR WARRANTY - Backed by our 1-year warranty guarantee within both US and Canada