SWORD I-461R1 (USB) - Size: 80×24×31.5mm. - 30 Chips Red COB LED. - Brightness: 50 Lumens. - Rechargeable Lithium-ion Polymer Battery. - Run time: 6hrs (Low Beam) / 2hrs (High Beam) / 200hrs (Flashing1) / 200hrs (Flashing2) / 4hrs (Pulsating). - Charge: 2.5 hrs (DC/5V, 0.5A). - Strap: fits Ø19-Ø35mm. - Weight: 30g.