USB Rechargeable Light Bulb: This e27 screw bulbs features a detachable charging design that eliminates the hassle of frequently unscrewing the base, bringing convenience to daily use. With a battery capacity of 2000mAh, it can run continuously for 8-36 hours, saying goodbye to the trouble of frequently replacing AA batteries or worrying about acid leakage. Color Temperature & Brightness Adjustable: Included remote control makes it easy to operate, allowing you to quickly turn the light on and off remotely, switch between warm, natural, and cool light (3000k/4500k/6000k), and choose from 3 different brightness levels (30%/60/100%). The LED light bulbs remembers the last brightness setting when turned on again, eliminating the need to repeat the setting. Timer Function: The battery powered light bulbs is 60mm in diameter and has an output of up to 350 lumens, equivalent to a traditional 40-watt bulb. It features an innovative 280° arch diffuser to provide better lighting and a 4-stage