ROMOSS Sense 4P 10400mAh Power Bank Smart Charging Auto detects the voltage and current of your device and delivers the fastest possible charge speed. The new LCD display shows the remaining power so there’s no need to guess how much power is left. Always Stay Safe Surge protection, short circuit prevention, and more advanced safety features keep you and your devices safe. Save Your Time with Every Charge Dual output, equipped with Fit Charge and Fast Charge Technology deliver high-speed and safe charging for 2 devices simultaneously.