they told me in an email
Thank you for your attention about JXD-S7800.
Below is the main specs of S7800, for your reference.
7-inch 1280*800 IPS Screen, Dual USA CTS Joysticks, Dual L,R buttons
Quad core 1.8GHz, 2GB DDR3 + 8GB Flash, support up to 32GB capacity expansion
5000mAh battery, dual speakers, dual cameras, HDMI output
But we will have two editions of S7800, S7800a and S7800b. Please pay attention to our official website.