Проверьте ошибки есть? спасибо заранее We present you the high-tec bench, a technologically advanced bench. The most important part of the bench where you sit, is made of plastic like the back of the bench. This bench is equipped with a umbrella with integrated lighting, the lights are automatically activated at 6 pm and deactivated at 7 am by default. These lights are also controllable with an application that can be installed on a cell phone, the application can control the color of the light and its activation time. To recharge the lights you just need to plug the umbrella into a electrical plug, for the umbrella it's made of canvas and protects very well from rain.
high-tecH мне кажется стоит переделать саму структуру: we are going to present you our invention. So, it's high-tech bench, actually technologically advanced bench (technologically звучит страно в предложении, нужно услышать мысль, чтобы подобрать нужное слово). Далее: The bench consist of part, where u sit (и дополнить надо из чего состоит). Mainly, it sitting part made of plastic as well as back part of bench, where u can lean. (или просто benchs made of plastic.). Вместо activate я бы использовал turn on and turn off. These light could be controlled using special application, that u install on your mobile phone (cell phone редкость услышать и надо использовать passive voice). Остальное нормально.