As product is Chinese version, when you connect to App to use, please set App location to China Mainland. Then it will work well. Thanks for your understanding.
The devices need to be used with the Bluetooth mesh gateway.

Parameters

Technical Specifications : E27

Voltage: 200V-240V~50/60Hz

Working Temperature : -10°C - 40°C

Power Rating : 5W(16 x 1W/LED Module)

Working Humidity : 0% - 85%RH

Color Temperature : 2700 - 6500K

Luminous Flux : 500im @ 4000K

Wireless Connection : Bluetooth-compatible 5.0

Feature

Mobile Phone & Voice Control,Never Get Out Of Bed And Turn Off The Lights Again.

By Supporting Bluetooth Mesh Little Love Tone Of Gateway Function Box And Other Equipment Connect The Light Bulb To Mijia App.

Not Only Support Voice Dimming , You Can Also Go Through The Rice House App Make Timing Switch Close The Close Setting Of Delay Light Off, Etc.

New Group Control,One Key Control Of The Whole Room Lighting.

Through Mi Jia App The Bulb Can Be Controlled In Groups , Lamplight State Real-time Synchronization.

MIJIA Led Bluetooth Bulb Mesh Version Normal Use, Need Matching Branch Bluetooth Mesh Gateway Enabled Devices.

Bluetooth Mesh Equipment Mutual Repeatable Signal , Stable And Not Easy To Drop.

Bluetooth Mesh Technology,Make Multi Light Control Simple.

Bluetooth Mesh Technology,

Do Not Occupy Router Bandwidth Stable And Hard To Drop.

You Can Access The Internet In One Sentence, Operation Simple And Convenient.

Free Adjustment Of Brightness And Color Temperature,Match Your Ideal Light.

Free Adjustment Of Light Cooling And Heating, Cold White Light, Transparent And Bright Warm White Light Comfortable And Gentle,Warm Yellow Light Relaxing, Let Family The Temperature Of Light.

Mijia Led Bluetooth Bulb Mesh Edition, Brightness 500m@4000k ,Power 5w; Colour Temperature 2700-6500k,Color Temperature Control Deviation ±10%.

Pure White Simplicity, Durable.

High Refractive Index Pc Luminous Surface，Soft And Bright LightLightness Of Material，Quick Heat Dissipation.