I have one of these
Neet® - 2 Way HDMI SPLITTER BOX 1x2 Port (1 input 2 output) - Active Amplifier - 1080p Full HD - Display HD on 2 TVs - *** LIFETIME WARRANTY ***
available on Amazon.
Does exactly what it says on the tin. I have one driving a 25m hdmi lead with no booster.
I reviewed this as laurie53.