That one you linked does say only 1 device of the 2 on the end, should be on at any given time.
I also figured that since you said you want two devices on at once, that an amplifier would be needed to pull that off. And it turns out that I was right.
I went digging again. This one says it will do what you want, but it costs $21.20
Panlong HDMI Splitter 1 In 2 Out 1x2 2 Port Powered Amplifier for Dual Display with 1080P, 3D, HDCP Support
http://www.amazon.com/dp/B00CET4B2S?psc=1
Panlong HDMI 1x2 Splitter
View HD content on two displays
This HDMI splitter lets you use dual screens (HDTV, monitor or projector) with one HDMI source. It will take any HDMI A/V signal (from Blu-ray, PS3, cable receiver, PC etc.), duplicate it and send it to 2 displays simultaneously. Both displays will have the exactly same video and audio format.
HDMI 1.3b and HDCP Complaint
Supports up to full HD 1080p resolution and 480i/576i/480p/576p/720p/1080i. HDCP complaint – no need to worry about HDCP handshake issues. Supports 3D (To get 3D, source, displays and HDMI cables must all support 3D).
Reliable Performance
The splitter also has the ability of buffering and amplifying HDMI signal to support long HDMI cables at the input and output (up to 15m AWG26). The heavy-duty metal enclosure protects the insides and keeps the unit cool by aiding in quick heat dissipation.
Includes Ace Deal One-year Hassle-free Warranty.