For all those exercise enthusiasts who demand high quality, comfort and great audio in their earphones, the Altec Lansing MZX399 Sport In-Ear Earphones are designed with you in mind. Backed with 8mm drivers and a certified IPX7 waterproof rating, these earbuds can withstand immersion in water up to 1 meter for up to 30 minutes. Bluetooth Capable, Altec Lansings MZX399 Sport In-Ear Earphones are fully loaded and come complete with On-board microphone rophonerophone and song navigation/telephony buttons so you can manage your music and calls efficiently.