Output Level: 103dB @ 1m. RF Range: >50m on site (2000m in open field). Radio Type: ALPHA and V2GY (automatic selection). It is compatible with all DOMONIAL panels using V2 or ALPHA protocol. Output level Control: Selectable from 0 to 7 plus sweep mode. Cut-off Timers (strobe and sounder): Selectable from 1s to 240s (from point of trigger, it knows its sound/flash duration). Battery Type: SEF8M: 8 x 1.5V FR6 AA Lithium batteries. Battery Life 4 years. Dimension (h x w x d) 330 x 240 x 73mm. Rear tamper and case tamper. Operating Temperature -25°C to +60°C. Grade 2. Lens Colour: Orange (supplied), Red or Blue (optional).