Portable size, convenient key ring end to attach to your keys.
Plugs into any powered USB slot for recharging.
Built in battery
Standard direct USB plug.
USB Rechargeable lithium battery.
Red "charging" indicator changes to green after charged.
High power 0.5 watt shines 50 meters.
High output and emergency strobe function.
180 + minutes light per 15 minutes charged.