(For USA customer only) How to change the led pharmacy cross Voltage from 220VAC to 110VAC

How to change the led pharmacy cross from 220VAC to 110VAC to accommodate USA Voltage.
IMPORTANT: EUROPEAN CUSTOMER PLEASE DONT TRY!!! OR THE CROSS WILL BURN AND EXPLODE!!!

Voltage levels:
All of Europe, Africa, Asia, Australia, New Zealand and most of South America use a supply that is within 6% of 230 V, whereas Japan, Taiwan, North America and some parts of northern South America use a voltage between 100 and 127 V. The 230 V standard has become the most widespread so standard 230 V equipment can be used in most parts of the world with the aid of an adapter or a change to the equipment's connection plug for the specific country. In the UK electricity is supplied at 230 V +10% - 6% (BS 7671 Appendix 2 section 14. )

To accommodate the difference, our led pharmacy cross appliances marketed in worldwide can be switched between the two Voltages(100~240VAC)

Change Led cross Power supply Voltage:

Step 1, Power off:

Step 2, open the control box:

Step 3, find the switch in the power supply:

There is a red button in the power supply.It can choose 220V AC and 110V AC for power.

It is not comfortable to press the button.You can use one pen or a stick to help you.And 
press the 110AC power.Then it can work.

Know more about it:

The choice of utilization voltage is due more to historical reasons than optimization of the distribution system—once a voltage is in use and equipment using this voltage is widespread, changing voltage is a drastic and expensive measure. A 230 V distribution system will use less conductor material to deliver a given amount of power because the current, and consequently the resistive loss, is lower than for a 120 V system. While large heating appliances can use smaller conductors at 230 V for the same output rating, few household appliances use anything like the full capacity of the outlet to which they are connected. Minimum wire size for hand-held or portable equipment is usually restricted by the mechanical strength of the conductors. Electrical appliances are used extensively in homes in both 230 V and 120 V system countries. National electrical codes prescribe wiring methods intended to minimize the risk of electric shock and fire. (From wikipedia)