... -proof, protection in ectrical short-circuit, automatic power-off on the socket , 100,000 hours LED’s Lifetime.2. Reliability: Bulletproof glass ... the product more relia -ble.3. Portable: Just a head lamp , Small in size , light in weight , simple charging , easy ... for lighting degree, battery usage lifetime 1000 cycles, display cap lamp number,time, battery capacity by digital device, 6pcs dia 5mm ...