Hammer commits to provide hassle free music experience to everyone with zest earphones which are well designed, fashionable, portable, pure acoustic and multi- functional. Zest earphones by Hammer are built in with advanced electronic acoustic technology leading you to wonderful music, enjoying happy and healthy music driven life. These earphones are compatible with smartphones, tablets, laptops and other Bluetooth devices. Manageable with easy control functions and ultra long playtime. Please use the original charging cable provided with the newly packaged product set and do not use over voltage for fast speed charging.