Features

• Fully compatible with the Crazyflie 2.X ecosystem (except LED-ring)
• Multiple positioning technologies supported
• Easy to assemble and no soldering required
• Supports expansion decks with automatic detection
• Wireless firmware updates
• On-board charging via standard uUSB or contact pads
• Open-source software with extensive library support
• Swarm and ROS support
• Low latency radio with peer-two-peer functionality
• 4 x 08028-10000KV high-quality motors generating up to 30 grams thrust each
• 4 x integrated 1-cell 5A ESCs running BLHeli_S/Bluejay
• Custom-designed and optimized 55mm propellers with 35mm pitch
• Flight time with stock battery: 10 minutes
• Max recommended stock payload weight: 40 grams

Package contents: 

• 1 x Crazyflie 2.1 Brushless control board
• 1 x 350 mAh LiPo battery (spare part)
• 1 x Battery holder (spare part)
• 1 x Foam battery pad
• 5 x Propeller guards (1 spare)(spare part)
• 5 x Standing legs (1 spare)(spare part)
• 4 x Brushless motors (spare part)
• 14 x Short (black) screws
• 4 x Long (silver) screws
• 2 x Short male deck connectors
• 2 x Long male deck connectors
• 5 x CW propellers (3 spare) (spare parts)
• 5 x CCW propellers (3 spare) (spare parts)
• 1 x Micro-USB cable (48cm) (spare part)
• 1 x Screwdriver
  
• 1 x Propellers removal tool

Resources:

• Product page
• Datasheet
• Schematics

Disclaimer: 

You are responsible for handling the drone and its components. It is your responsibility to make sure you understand how your drone works and that it is in good working condition before flight. Using a drone in a reckless and negligent manner could cause damage or bodily harm, resulting in lawsuits, fines and jail time.

There are things you should do to ensure maximum safety:
    

• You should check your drone before and after each flight to make sure it’s working properly and there isn’t any damage.
• Don’t make contact with a spinning propeller. A spinning propeller is hazardous if carelessly handled. Avoid sticking your fingers close to them.
• When possible, build, test and configure your drone without its propellers attached.
• Avoid catching the drone mid-flight or while it’s landing.
• Always make sure that the path of your drone is clear to avoid any accidents.
• Use the propeller guards as much as possible