hard to maintain using it,
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This review is from: Koolertron Wireless Bluetooth 3.0 Game Controller Gamepad Joypad for Apple iOS iphone 4/4S ipad Android Phone/Tablet PC
It is a quite handy product it's got rechargeable batteries and it is very easy to pair with mobile phones. However, the buttons' placement makes it hard to use throughout a long period, as it fatigues the thumbs muscles a lot.