TT has performed a remarkable achievement in Security Field since its been established in 2004′ based in Shenzhen China. Over the past 15 years, we were so much experienced through the time of traditional CCD CVBS SDI analogue cameras and went through to the HD CMOS camera period, and the evolution to the current popular 4K IP camera system and Cloud Home Wi-Fi Battery Cameras. brbrTT>s Major Products are Professional Industrial Type of IP Cameras and NVRs HD Analogue Cameras and DVRs, and Latest and most popular Home Cloud Wi-Fi Battery Cameras which includes Solar Powered Battery Wi-Fi Cameras Battery Powered Wireless Wifi Video Doorbell, Smart Home Battery Powered Cloud Wifi IP Cameras they can be monitored remotely by Smart Phone App with Alexa Amazon and Google Home Two-way Voice Intercom Functions. ,br>brOEM and ODM PCB module design and manufacturing welcomed>br