[Pure Sine Wave] BESTEK 220v to 110v Voltage Converter, QC 3.0 200W Port Power Converter Adapter Combo for International Travel Overseas in European/UK/Ireland/Australia and More

An amazingly versatile voltage conversion device with many forms of input and output protection. If there is a fault, the output will shut off and the LED will turn red. You then have to power-cycle the converter to resume normal operation. I would prefer if it automatically resumed operation after an input abnormality, as such abnormalities do occur in countries with poor electrical grids.The only shortcoming is that since it has true sine-wave output, it uses a fair amount of power even with no load: 7 Watts. This is not a concern if you are traveling, but does add up to 5kWh per month if you use it as part of a permanent installation in a 240V household. In such an application, a traditional transformer would be more suitable.If it is idle (no load), the fan keeps turning on and off. The sound resembles that of a head seeking on an older style hard disc drive, in its characteristic and in its loudness. It will only bother you if it is next to your bedside. With modest loads, the fan runs continuously, and is very quiet. I also tested it at high load, with 180W of incandescent bulbs. The fan ran fast, making a noise that was audible throughout the room, however it was much softer than a running air conditioner, so I doubt it will interfere with sleeping. The exterior surfaces stayed at the same warm temperature as when it had no load, maybe even slightly cooler.

I've used this in 3 overseas trips. In the most recent trip, this product misbehaved in a big way. I connected a rechargeable battery pack (5000mAh) using one of the USB port, and suddenly there was a loud pop and a spark, and my hotel room lost all power. This Bestek power converter died, and it cut all A/C power and lights to my room and the one next to it. After getting a new room thanks to the hotel front desk, I tried this Bestek unit again - it was dead for good. If this converter cannot reliably handle low power electronics such as a USB-powered battery pack, it means the product quality is low. Quite unfortunately for me, the product return window closed a week ago.

So far we've only used this in Indonesia on 220v/50hz power. I use it for charging our various devices through the USB outlets, my macbook pro through the normal outlets (even though that's not necessary since the apple charger supports 100-240v) and a flat iron (for hair. the fiancee, not mine) and no problems thus far.Only complaint is when charging the MacBook Pro (87w charger) the fan does get fairly loud and it doesn't run at a consistent speed - it's constantly throttling up and down. If it just stayed at the same speed (even if it was the faster speed) it'd be far less annoying as we'd quickly get used to the white noise. We can easily hear the fan adjusting up and down across the bedroom. If the macbook's battery is pretty low this can go on for an hour or so, and as the fiancee is a light sleeper this is pretty annoying for her. I usually try to charge up the laptop before bed which has alleviated the issue for us.As a side note, charging a 9" iPad and a iPhone Plus only causes the fan to freak out for a minute or so- not near as bad as the laptop, and once the fan has gotten over it's initial anxiety the unit is very quiet while topping up those two devices simultaneously.

I would give this five stars for how it performed both in India and the Netherlands. I was able to use with my curling iron and all other electronics including more than one at a time. However, no directions were included and it was not obvious which plug was for the various countries, so I spent time Googling to figure it out. A simple insert with a picture of each plug and which countries they work in would have saved me a lot of time.

I’ve had this item for four months now and although I enjoy what it’s purpose is - connecting multiple items including hair dryers, electric toothbrushes, etc., I’ve come across a couple challenges with it in the 5 countries I’ve taken it to. 1. The motor in the device can be loud while charging.2. I have been shocked multiple times plugging my phone in or taking my phone off the charger. I’m not sure why that happens but it is frustrating.3. It’s a bit on the heavy side.Unfortunately I’m past the return window or else I would’ve returned it.