[vov]

best variant use any device like TP-Link 3020 or 3040

http://www.tp-link.com/en/products/detai...=TL-MR3020

1) Standard WiFi onboard (we use it also for translate video/audio to iPads and other tasks)
2) 3G or 4G when available
3) Could be integrate with WiFi extender and etc
4) power - 5v, use USB or car adapter from main battery for permanent power