Inovonics EN1501 Wireless Pulse Meter Transmitter Platform: Inovonics Echosteam Data Logger Required: Yes - Inovonics RDL8500 or Nobilico NRDL-3141 or NoWire NW1100-3 Works With: Any pulse out meter, water, gas, electric or run-time Recommended Water Meter: MasterMeter Poly FAM Battery: CR123A 3v - Runtime 3-5 years