Does it require batteries: No Whether it is a smart device: Yes Model: Projector night light Voltage: 5V : LED bulb Battery type: Lithium metal Power supply: DC Power: 0-5W Power Generation: Switch Does light bulb included: Yes [APP remote control] Tuya or smart life APP can be used to remotely control the devices. 1. Adjustable nebula speed. 2. 16 million colors adjustment. 3. Adjustable brightness. 4. Countdown and Timer. 5. Different modes. [Support voice speaker control] The Projector is compatible with for Alexa and Google Home Assistant, allowing you to use control it.Giving your hands free [Timing] The Projector is automatically turned on and off at a given time through the timer function. [Share]The control switch can be shared with family members. Power Output: Less than 1 mW per beamlet Wireless Type: WiFi 2.4G 1T1R Laser color: Green, 515-520nm Control by: for , Google Home, APP Material: abs colour: Black Package Contents: 1 x Projector lamp 1 x Charging cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.