Bluetooth is a wireless technology standard that allows data transfers between devices placed in close proximity, using short-wavelength, ultra-high frequency radio waves. Newer versions provide faster data transfers.
Newer USB versions are faster and have better power management.
GPS enables global positioning, useful in map, geo-tagging or navigation apps.
A compass is useful for gaming, maps, and navigation software.
Wi-Fi 4 (802.11n) is a wireless standard released in 2009. It has faster transfer rates and improved security compared to its predecessors – a, b, and g.
The device can connect to Wi-Fi.
An accelerometer is a sensor used to measure the linear acceleration of a device. A common application is detecting when a device changes between vertical and horizontal positions.
Devices that use cellular technology can connect to mobile networks. Cellular networks have much wider signal coverage than Wi-Fi.
You can use your voice to control key functions of the device and you can easily access your device without pushing any button.