This was too long for a comment. In addition to GodJihyo's answer, be aware that if this "outlet" indeed splits one "hot" to one receptacle and the other "hot" to the other receptacle, some devices may not play nice between the two receptacles.
Imagine this: you plug this 240 V cable in, then plug in a no-name 120 V to 12 V battery charger into hot "A". So far so good, the battery is being charged. But it isn't charging fast enough, so you plug another no-name 12 V battery charger into "B" and also connect this to the battery. The moment the positive leads touch, both chargers (and the battery) explode. What happened?
The answer is that hots "A" and "B" are both 120 VAC, but one is 180° out-of-phase with the other. It has to be, for the sum of them to equal 240 VAC. So during every AC cycle, while A is positive, B is negative and vice-versa. In the case of these no-name battery chargers, their electronic controls were not designed with the vision that sink currents might peak when source currents valley and vice-versa. Such a condition upsets their stability, resulting in shutdown, failure, fire, etc.
Now I don't know if a no-name battery charger like this really exists, but it probably does (the cheaper, the more susceptible.) This is a design criteria which may be often overlooked, especially on cheaper electronics.
In most of my experiences of mixing A and B devices, any failure that does occur is usually more in the "severe" category rather than the "simply shuts down" category.
But I can say that some live pro audio gear (mixers, instrument amplifiers, etc.) are susceptible. Once a modern instrument amp was connected to an extension cord then patched into the mixer. The moment that (audio, 1/4" tip, supposed to be high-impedance) connection was made, it sparked and killed both devices. The outlets were wired fine - the issue was mixing hot "A" and "B" outlets due to the extension cord. After being electrocuted on the lip from a "bad" extension cord also, I'm very careful of extension cords and unfamiliar outlets. Learned to carry an outlet tester (the hard way.)