This is a smart light bulb that can be controlled by mobile phone APP and voice, supports adjusting brightness, light color, time setting, etc., and is a practical smart home device. Note: 1. Due to manual measurement, there will be a 1-2 mm error in the size. Thanks for your understanding. 2. Due to different light conditions and different monitors, item color displayed in photos may be showing slightly different from real object. Specifications: Type: Round, Flat (Optional) Shell Color: White Material: Plastic #43; Aluminum Socket: E27 WiFi Standard: 2.4GHz System Supported: Compatible with iOS / Compatible with Android Type Luminous Flux Input Rated Power Color Temperature Item Size Packing Size Net Weight Gross Weight Round 1000LM US 110-130V 9W 2800K-6200K #43; RGB 10.5*6*6cm / 4.13*2.36*2.36in 12*7.5*7.5cm / 4.72*2.95*2.95in 40g / 1.41oz 68g / 2.40oz Flat 1300LM EU 220-240V 13W 2900K-6000K #43; RGB 12.8*9*9cm / 5.04*3.54*3.54in 13.7*10*10cm / 5.39*3.94*3.94in 150g / 5.29oz 225g / 7.94oz Package List: 1 * Smart Bulb 1 * User Manual ( English )