At A&M Moto Toys we include 6" of Dual Lock 3M Velcro with your purchase. This will allow you to mount the H30 to most helmet.
 
H30 is the brightest LED headlamp on the market driven by a single 21700 battery. Suitable for mining, exploration and outdoor search, with the secondary LED options of Red+Green. Red LED preserves your night vision; Green is useful for night vision.
 
1 x Cool White 6500K +Two Auxiliary Red + Green
Size: 89.4mm(length)x40.8mm(head diameter)x29mm(tube diameter)
Weight: 80g excluding battery; 151.5g including 1x21700 battery (IMR21700NP-510A); headband with silicone holder 38.8g
 
Features:
5-year limited warranty
USB-C (Charging)
Extra o-rings
Powered by 1 x 21700 5100mAh rechargeable Li-ion battery (Included), 1 x 18650 battery compatibility
Two way USB-C cable capable of charging phones, tablets and more as power bank
6 brightness levels option and Red SOS special mode
Waterproof: IPX68 (2 meters submersible
 
Note: 
Flashlight Transport WarningPlease remember to turn off light and stick film insulation between battery and switch during transportation.