Features: brand new and high quality Extensible: You can also use it to develop your own software. It is indeed a ESP8266 development board, easy to operate. Improved: Built in Antenna, you do not need antenna separately; 3D print for protection for the watch body; Acrylic protective cover prevent the watch display from damage which occurs on the previous version; Simplified button operation, the navigation button performs most of the functions. Long working time: Built-in an 600mAh battery, working for time up to 7 hours. Comes with OLED display and a 3 way momentary slide switch. Note: Use it only for testing and educational purposes against your own devices! Firmware and Software download please refer to the below description. Upgrated: installed with the latest ESP8266 Deauther software. With this software, you can perform different secure tests for your WiFi networks. NOTE: ESP8266 supports 2.4GHz only. Specifications: Material: PCB Battery: 600mAh Color: as shown 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! Package includes: 1PC x Deauther Watch