IPUDIS Wireless Bluetooth Magnet Earphone with Microphone for Smartphones - Black The Farthest Bluetooth Distance In The World.We have updated the CPU,debug bluetooth distance to 82-100ft(25-30m) in free space Magnet Attraction:Built-in magnet ,makes it stable around neck and it's just like a necklace when you don't use earphone, it's just like a necklace Support send voice from siri,whatapp,wechat Full Capacity Battery:We add Lithium battery protection board to battery and long battery life Support ISO power display on good cellphone