Sofirn SC18 USB Type C Rechargeable Flashlight, Super Bright Small Light for Emergency, 20W High-Power SST-40 LED, Maximum Output of 1800 lumens

1. Emitter: SST40 LED   2. Working Voltage: 2.7V - 4.2V   3. Battery Options: 1 X 18650 Li-ion battery   4. Dimension: 101.5mm (length) × 24.7mm (head diameter)   5. Weight: 55g (without battery)   6. Flashlight body: Aerospace grade 6061 grade aluminum alloy   7. USB Type-C Charging   8. Mode Memory: memorizes the last brightness level used in the general modes (except Moon, Turbo and Strobe)   9. Advanced Temperature Regulation (ATR) technology: ATR will adjust the brightness level automatically when the driver temperature reaches relatively high temperature to prevent overheating.   10. Reverse polarity protection: it cuts off the power while battery inserted improperly. LVP: while on, if the battery voltage is lower than 2.7V, it turns off automatically. HVP: while on, if the battery voltage is higher than 4.35V, it turns off automatically.   11. The power indicator shows the power status for 5 seconds after turning SC18 on. Green = remaining battery level is good Red = remaining battery power is poor. Flashing Red = critical battery level, please replace or recharge your flashlight as soon as possible.