Wireless controller for Genesis / Mega Drive. It can be used with Master System as well Low power consumption. Up to 150 hours of gameplay on one charge. Power saving mode. Battery discharge time is more than a year in this mode. If the controller is not used for a few minutes, it goes into power saving mode, after pushing on start or d-pad buttons controller immediately will back to active state. Quick response. No input lags. Response time is around 2.7ms Special compatibility mode with Genesis 3-buttons and SMS controllers. Some games dont work well with 6-button controllers, but joyzz offers compatibility mode to fix this issue. 800mAh li-ion battery compatible with Nokia BL-4C series. Such batteries became the standard and they easy to buy and replace in the end of life time Charging via Micro-USB port