Your Trio Display can be powered using the supplied power supply or with 3 x AAA (R03, LR03) non-recharchable batteries.
Do not use any other power supply with this Display. The supplied power supply is not suitable for use with any other USB device (not a USB data cable).
It is not recommended to use batteries for a prolonged period.
To replace batteries, slide the stand downwards and then pull it away. Insert the batteries, as marked on the inside case. Re-attach the stand and the Display will show the battery symbol INSERT BATTERY SYMBOL at the top of the screen.
Do not use rechargeable batteries in this Display.