This is the Futaba PS-01RS5.0 Step Down Regulator.

FEATURES: Allows the use of a 4.8V servo with a high-voltage (HV) 2.4GHz radio
            system
          Steps servo power down to 5V
          One year limited warranty through Hobby Services beginning at date
            of purchase

INCLUDES: Futaba PS-01RS5.0 Step Down Regulator with Connectors and Instruction
            Sheet

REQUIRES: Installing between servo and HV compatible receiver or gyro (see
            COMMENTS)

SPECS:    Main Application: 4.8V rudder servos
          Input Voltage Range: 6.0 - 8.5V
          Output Voltage: 5.0V
          Rated Output Current: 1.0A (momentary maximum 5.0A)
          Operating Temperature Range: -10 - +45C
          Storage Temperature Range: -20 - +60C
          Dimensions: 0.95 x 0.31 x 0.33" (24.2 x 7.8 x 8.3mm)
          Weight: 0.18oz (5.2g)

COMMENTS: Do not connect between battery and receiver. The receiver may operate
            erroneously due to insufficient capacity and fail to control the
            model.
          Cannot be used with a Y-harness to supply power to multiple servos.

                                                                   jxs 10/10/11
                                                                         ir/jxs