Bulb: CREE XM-L2 U2 (Max 860 lumens) 
Reflector: glossy aluminum reflector 
Lens: 4 mm toughened glass 
Surface treatment: premium anodizing 
Battery: 18650 Li-ion battery*1 
With battery over-discharging protection, polarity reversing protection 
Dimensions: 145 mm (length) * 34 mm (dia. of lamp head) * 28 mm (dia. of lamp body) 
Net weight: approx. 148 g. (without battery) 
Underwater weight: approx. 100 g. (with battery)