Shenzhen Tena shows the mockup for their upcoming RK3288 Quad-core ARM Cortex-A17 HDMI Stick. For now this is just a mockup, but the RK3288 HDMI Stick should get ready by around next month. With 2 USB Ports, IR remote control, MicroSD card. Shenzhen Tena will also provide a RK3288 based Set-top-box. Tena has a RK2928 Miracast dongle with 5Ghz WiFi. You can also watch my Factory Tour at Shenzhen Tena HDMI Stick maker filmed last year (2).
Contact info (please only contact them if you are serious about buying/importing large quantities of these devices):
Shenzhen Tena Ltd
Sales manager: Calvin Huang
Filmed at the HKTDC Hong Kong Electronics Fair (Spring Edition) 2014