This ultra-compact 50-lumen headlamp is perfect to keep around for emergencies or back up. There's an emergency whistle built into the headband.

• This ultra-compact 50-lumen headlamp is perfect to keep around for emergencies or back up. There's an emergency whistle built into the headband.
• Always ready to use, and can be stored with batteries (2 x lithium CR2032) for 10 years
• Locking on/off switch designed to prevent accidental operation
• Works in extreme temperatures (-22F to 140F)
• Waterproof down to 1 meter for 30 minutes