PLEASE NOTE: WE ORDER ALL ITEMS FROM THIS SUPPLIER AS WE GO ALONG, AND WE NEED TO CHECK WITH THE SUPPLIER FIRST TO MAKE SURE THERE IS AVAILABILITY. MANY THANKS IN ADVANCE, WATERWORLD SPORTS Smart Optical Flash Tube Lite (SOFT Lite) Patented Product Product Features Enables to narrow down beam coverage simply by attaching in front of strobe. The aiming light of SOFT-LITE can be changed between red and white. Adjustable brightness Aiming light delay off time adjustable Use one 21700 Lithium battery which can support 10 hours of continuous use(You can use 18650 battery by using a battery adapter) Product Specs Material?Plastic Length : 155mm Weight : 600g (on land) Neutral buoyancy underwater Waterproof depth : -100m Focal length (in water) : 130mm Light spot adjustable range : 3~50mm