Seems like a good price for a pack of 4 bulbs. Also the reviews seems to be good.
【Voice Control】Easy voice control of all light bulbs via integration with Amazon Alexa or google assistant, this includes on/off, brightness/temperature and scenes. Ex, you can say, "Alexa switch my main light brightness to 50 percent". No Hub/Bridge Required!
【Timing Control】 Never come home to a dark house - by using light schedules on the 'Smart Life' app and be greeted with warm white light. The timer function enables smart led light bulb power on and off automatically.
【Remote And Group Control】Keep connecting this wifi bulb with your home network(only supports 2.4GHz Wifi), you can remotely control it on your smartphone or tablet to simulate someone being at home when you are away. Group control function allows you to control more than one bulb at the same time for scene setting.
【Dimmable Bright Light & Energy Saving】The light brightness can be fixed percentages from 1% - 100% output, you can set many different scenarios like 'Reading Light' 'Party Light' 'Soft Light' etc. Our Smart light bulb using LED rather than incandescent bulbs. It is less energy, produces less heat, good for saving energy.
【Wide Compatibility& Warranty】 AISIRER Smart Bulb e27 is compatible with multiple free smart apps like - Ahome, Smart Life, Tuya, efamilyCloud, IFTTT. We offer two years warranty for the product quality, 7/24 customer service. If you have any question about the product, please do not hesitate to contact us through the order, we will spare no effort to assist you.