High-tech multi-point support that allows two smartphones, mobile phones, etc. to stand by at the same time. It is convenient for those who have multiple units. Uses a high-performance lithium-ion polymer battery to charge the main unit without replacing the battery! A maximum of 5 hours of continuous talk and a maximum of approximately 160 hours of continuous standby are possible. In addition, it can be charged about 500 times repeatedly. Equipped with music play / stop / volume up / down functions. It also functions as an incoming call button, so you can use it comfortably. When the power is turned on / off, the LED lamp blinking function will notify you as a voice.