Built in Features Include:

• 3-axis accelerometer
• Temperature sensor
• RGB LED
• 3.7V 600mAh LiPo battery
• ATmega 328p @ 8 MHz clock speed
• 16 digital I/O pins, 6 analog pins
• Bluetooth LE Peripheral (not Central-capable)
• Wireless programming
• 2 built-in Grove ports for easy and quick component connection
• Support on OS X, iOS, Windows 8+! Not supported by Windows 7

Note: Battery is included!