The X-ASR Basic Control Board, manufactured by GATE of Poland, provides a creative solution for AEG airsoft replica owners. The top-notch X-ASR MOSFET system guards components, boosts trigger response, and extends battery/electronics life. It also features built-in diodes to detect basic troubles and errors. X-ASR is designed for M120 springs, although it can accommodate more powerful replicas. To guard against damage, polarity reversal is detected. Note: No box, connectors, wiring, or instructions included. Product is new and fully functional.