FST-951 with B501

Detection Type: Fixed Temperature type, activates when heat reaches 57°C (135°F)
Voltage: 15-32 VDC
Standby Current: Max 200 NA @ 24 VDC
Display: Dual 360-degree visible LEDs (flashes normally, solid on when an event occurs)
Address Setting: Uses rotary switches to specify location
Protocol: Supports FlashScan and version -IV supports CLIP
Standards: UL Listed and FM Approved
Base Size (B501): 4 inch (10.2 cm) diameter
1 year warranty