Acebeam H40 Mini Headlamp Stepless Dimming from 1050lumens to 5lumens by Li-ion Battery（Include）, Ranging from 250lumens to 5lumens by Ni-MH or AA Battery Great for Reading Running Hiking Hunting;

Features:
1xCREE XP-L HD LED
Powered by 1xLi-ion (700mAh)/ Ni-MH (1900mAh) / Alkaline battery (excluded)
A)1xLi-ion (700mAh) battery:
Low: 1 lumens; 29 hours
High: 230 lumens; 65 mins
Turbo: 1050~350 lumens; 40s + 40 mins
SOS: ~, 12 hours

B)1xNi-MH (1900mAh) battery:
Low: 1lumens; 50 hours
High: 230 lumens; 85 mins
Turbo: 250 lumens; 80 mins
SOS: ~, 18 hours

C)1xAlkaline AA battery:
Low: 1 lumens; 60 hours
High: 230~130 lumens; 3 mins + 65 mins
Turbo: 250~130 lumens; 2 mins + 70 mins
SOS: ~, 7 hoursMax

output up to 1050 lumens
Max running time 52 hours
Max beam distance 102 meters
Peak beam intensity 2600cd
Impact resistance: 2 meters
Waterproof: IP68
Size: 64.7x26.9x23.4mm
Weight: 34g without battery
Single button switch for controlling infinitely brightness
Constructed from Aero grade Aluminum Alloy
Robust HAIII military grade hard-anodized
Confirmtable Elastic Headband with sweat channeling and reflective
Over-heat protection to avoid high-temperature of the surface
Toughened ultra-clear glass lens with anti-reflective coating, which achieves a 98.3% light transmittance