Stud50 Strap | BLS-230 - Output / Runtime: 200 Lumens/50 Lux (3 hours), 50 Lumens/13 Lux (10 hours), Flash (30 hours) - Safety: Runtime safety mode + 2 hours - Beam distance: 175 meters - Light Type: OSRAM LED - Battery: USB rechargeable Lithium Polymer, 2500mAh - Charge / Time Port: 3:00 hours (2A) / Micro USB - Steady Modes: High, Standard, Low (saves last mode) - Flash Modes: Flash, double-click (saves last mode) - Weight: 106 grams - Fixation: Strap mount - Water Resistance: IPX5 SlideRear | BLS-236 - Output / Runtime: 16 Lumens (5:00 hours), 4 Lumens (16:00 hours), Flash (48 hours) - Safety: Runtime safety mode + 3 hours - Light Type: 4 LEDs - Battery: USB rechargeable Lithium Polymer 500mAh - Charge Time / Port: 1:00 hours (2A), Micro USB - Steady Modes: Low, High (saves last mode) - Flash Modes: Flash, Day Flash, Steady Flash (saves last mode) - Weight: 23 grams - Fixation: Strap mount and clip for versatile placement - Water Resistance: IPX4