... Vibrate when call come /Prevent mobile lose /Apply to all bluetooth mobileSpecifications:* Color: Black and White* Connectors/Ports: Charging port ... the B Button even longer to pair the device for Bluetooth.* The A button is used to cycle through time ... ,sync usb Cable, accessories for Iphone/Ipad/Ipod, for Samsung, Mini DP,HDMI,etc. bluetooth bracelet, watch for iphone,for all bluetooth mobile phone