This is product is discontinued and does not have a replacement yet. New product in development. What does that mean?

Here are the technical details for the S2 MultiSiren ZSE19:

• Z-Wave Signal Frequency: 908.42 MHz
• Power: 4 x LR14 (C Cell) battery
• Siren: 110 dB
• Z-Wave Range: Up to 100 feet line of sight
• Installation and Use: Indoor Only
• Operating Temperature: 32-104° F
• Operating Humidity: 0-80%
• Dimensions: 1.7" x 2.3" x 7.9"

Questions? Just ask!