Nash Bite alarm siren R2 With multi-LEDs with push-button adjustment (red, blue, green, white or purple), six sensitivity settings 10 mm – 85 mm, direct screw connection for Nash Bobbins and Slap Heads, four volume levels, five tone levels, battery level warning indicator. Incl. rubber compression disc for perfect alignment on the buzzer bars. Requires 1 x CR2 battery (please order separately).