This is product is discontinued and replaced with ZST39 . What does that mean? Here are the technical details for the S2 Stick ZST10: * Z-Wave Signal Frequency: 908.42 MHz * Power: 4.75-5.25 VDC * SDK: 6.81.02 * Range: Up to 130 feet line of sight indoors (up to 500 feet in open space) * Installation and…