The SpectrAlert Advance SRHK-P is an unmarked, red, outdoor strobe with selectable high-candela strobe settings of 135, 150, 177 and 185 cd. Outdoor back box included.
Charge decay <0.1 Sec Velcro band available in black Comfortable wristband with 4mm snap 1 Meg Ohm resistor for added safety Standard Banana jack Alligator clip