UV-Resistant, industrial-grade Silicone Rubber Body and Straps; Polycarbonate Housing; PMMA Lens; Anodized Aluminum Heat sink; Anodized Aluminum Fascia and solid Stainless Steel MIM Latch * Steady mode: 3.5 hours / 2 & 3; Flash modes 4-5 hours * 4 Peloton mode: 13 hours / 5 Eco Flash: 20 hours