the room is so small to add more bed

Hi Ivan! I booked my reservation via Agoda and the total amount already included the tax and other charges. No need to pay a service charge. However, you will be required to deposit a certain amount for security purpose which is refundable upon checking out. Hope this helps! Enjoy your stay!

Yes, they have adapter for other kinds of plugs from other countries. But you could bring an extra just in case you have more gadgets that need to be charged at the same time.