Rain8 Specifications   Electrical  Volatage  24 - 27v AC, 50 or 60 hz 120v AC to 24v, 300 ma, class 2, wall mounted transformer is included with all orders (US and Canada only). 220v AC users need to supply a 220v AC to 24v AC transformer. www.laser.com sells 220v TW523s. Controller Current  30ma Sprinkler Valve Voltage & Current 24v AC , 250 ma max (with supplied transformer) Connections 12 place, plug in terminal strip. Two piece design allows user to unplug controller from sprinkler valve and power wiring. terms 1 - 8 (sprinkler valves 1 - 8) term 9 (sprinkler valve common) term 10 (no connection) terms 11 & 12 (24v AC from transformer) PC (RS-232 serial port) Used only to configure controller. Controller derives its power from PC. DB9 Power Line Interface (RJ11 data port) connects to X10's Tw523 or PSC05. Interconnecting cable is included. RJ11 Mechanical Controller Size 3.8" x 2.4" x 1.0" Weight 4 oz Environmental 20 - 125 degrees Indoor or outdoor (if mounted in a weatherproof enclosure).