On-board MEMS microphone, providing sound input for :bit, built-in LED indicator on the front, external bias circuit ( to ground) 33K:1KBuilt-in speaker to play sound In addition to outputting sound through PWM on the pin, :bit V2 also has an on-board electromagnetic speaker, which can output sound to complete more experimentsThe logo on the front of the capacitive touch sensor becomes a metal capacitive touch sensor, which can return digital signals to :bit V2 like a buttonProvide up to 200MA current Built-in discrete voltage regulator chip, which can provide up to 200MA current for peripheral accessories, providing more powerful support for projects such as camel machine controlCompared with the previous generation :bit v1.5, :bit V2has the same excellent and powerful functions. On the basis of the same functions, it adds functions such as speakers and microphones, allowing children to use sound and touch in the classroom. Get with easeProduct: : bit V2Suitable for the crowd: students and enthusiasts above elementary school)Processor: 512kb flash 128K RAMSize: 43x52mmProgramming environment: online programming + local programming toolsProgramming languages: makecode, Python, ScratchOnboard components: I/O signal port, Bluetooth, electronic compass, programmable buttons,LED dot screen, accelerometer, microphone, touch-sensitive LOGO buzzerConnecting external devices: alligator clips, expansion boardsWireless connection: 2.4GHz wireless network 4.0BLE Bluetooth supply: -usb 5v supply, 3V interface or battery box supplyOutput current: 200 MAColour:blackMaterial:PCBPackage Contents:1 x :Bit V2 Development Board(random colors, don't accept the specified color) 1 x Data Cable(random colors, don't accept the specified color) 1 x Battery Box (Built-In 2 x AAABatteries)Only the above package content, other products are not included.Note: Light 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.