Shure PS24US Replacement Power Supply for 

BLX4, BLX88, BLX4R, FP33, GLXD6, P2T, PG4, PGX4, PGXD4, SLX4, SLX4L and UABiasT (Replaces PS23US). 12V DC in-line power supply adheres to energy-efficient standards and features 2 built-in mounting tabs for easy installation. 

Input: 100–240V AC, 50–60 Hz. Current Drain (maximum): 150 mA. Output: 12V DC, 400 mA.