Features: brand new and high quality Deauther Watch: It is an ESP8266 development board, but you can wear it like a smartwatch, more convenient. The link to the code and video is obtained in the product description. Extension Board: You can use it to develop your own software. It is indeed a ESP8266 development board and easy to operate. Long Working Time: Built-in an 800mAh lithium battery, working for time up to 8-10 hours. Comes with OLED display and a 3 way momentary slide switch. Notice: This is a test tool. It's neither good nor bad. Use it to do good, to study and to test. Never use it to do harm or create damage! Use it only for testing and educational purposes against your own devices! Wifi Testing Tool: This esp8266 dev board is installed with the latest ESP8266 Deauther software. With this software, you can perform different secure tests for your for W i F i networks. NOTE: ESP8266 supports 2.4GHz only! Specifications: Material: PCB Battery: 800mAh Color: as shown Package Includes: 1PC x Deauther Watch note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!