SlideFront | BLS-235 - Output / Runtime: 50 Lumens (5 hours), 13 Lumens (16 hours), Flash (48 hours) - Safety: Runtime safety mode + 3 hours - Light Type: 4 LEDs - Battery: USB rechargeable Lithium Polymer 500mAh - Charge time / port: 1 hour (2A), Micro USB - Steady Modes: Low, High (remembers last mode) - Flash Modes: Flash, Day Flash, Steady Flash (remembers last mode) - Weight: 23 grams - Mounting: Strap mount and clip for versatile attachment - Water Resistance: IPX4 Slide Rear | BLS-236 - Output / Runtime: 16 Lumens (5 hours), 4 Lumens (16 hours), Flash (48 hours) - Safety: Runtime safety mode + 3 hours - Light Type: 4 LEDs - Battery: USB rechargeable Lithium Polymer 500mAh - Charge time / port: 1 hour (2A), Micro USB - Steady Modes: Low, High (remembers last mode) - Flash Modes: Flash, Day Flash, Steady Flash (remembers last mode) - Weight: 23 grams - Mounting: Strap mount and clip for versatile attachment - Water Resistance: IPX4