Quote from the review at Digit Life:
“When the battery almost runs out of charge (5 minutes in talk mode left), the headset gives an unpleasant signal every 15 seconds irrespective of whether you are talking or not. The charger plugs into a small connector on top. When it’s charging (it takes 1.5-2 hours) the LED on the Power button turns on red.
The X-Micro is an excellent Bluetooth headset. It’s compact, light, possesses good sound characteristics and a long battery life. It can be easily modified. The handsfree realization will definitely please you. “