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