Applicable for left and right ears, high pitch auricle reflex and low pitch bone conduction. Non-in-ear avant-garde design, creating a new concept of wireless earphone. Built-in new generation of mini-bone conduction loudspeaker, to effectively restore the sense of space of sound; benefited from the principle of bone conduction, you can still hear the sound played in earphone even in a noisy environment. Equipped with Jakcom self-developed OGS auricle reflex loudspeaker, so that you can hear the surrounding sound without sound volume and tone quality diminished, both healthy and safe., , Omnidirectional microphone, omnidirectional multiple noise reduction, ensuring full-duplex bi-directional HD calling in various environments. Combination of ear-hanging structure and non-in-ear open design, and the whole body is 8g in weight, only equivalent to a piece of chewing gum, no pressure of wearing. 5-mm thin body, simple symmetrical design, for easy wear on the left and right ears, or glasses bracket., , A new generation of Bluetooth 4.1 chip, fully compatible with a variety of devices, available with Bluetooth. 70mA power batteries, 120-hour standby, 6-hour continuous calling, 1-hour full fast charge, and support iPhone and iPad power display. Can connect two Bluetooth devices at the same time, and switch at any time, effectively improving work efficiency., , Waterproof and dustproof grade IP54, integrated body without welding; no matter how harsh the environment is, Jakcom ET will be your good helper. Turn on/off, Play/Pause, Answer/Hang up, Reject/Redial, Volume up, Previous song, Volume down, Next song.