This is the Ikelite DS160 Strobe Mark II Front Only Features: Controls 10 stops in 1/2-stop increments Strobe Connector Ikelite Bulkhead Port Mount LED Accessory Port 4800K Depth Rating 330 feet (100 meters) Weight 1.4 lb Dimensions 3.6" diameter x 4.75" length (91 x 120 mm) Battery pack, charger, and ball mount sold separately. In The Box Strobe front Bulkhead Cap # 9104.7 (installed) 2 year Limited Warranty The DS160 underwater strobe is the long-standing choice of professionals who need a strobe that can be relied on to perform over and over. No strobe on the market today comes close to the number of hours of factory and field testing as our DS160-series, including under the Antarctic ice.