Features 1. Ready to Install: Our DTU (Data Transfer Unit) is fully flashed and wired for direct installation into your own housing. Its compact design, with a width of only 25.4mm, allows for easy integration. 2. Stay Connected: With the included detailed installation guide, the DTU is plug-and-play ready. You can effortlessly monitor your PV modules from your mobile phone or PC, ensuring you have real-time insight into their performance. 3. High-performance Components: The DTU features a powerful ESP32, known for its superior speed compared to the ESP 8266. Additionally, it is equipped with the stronger NRF24L01+ module, complete with an integrated antenna. 4. Wide Compatibility: Specifically designed for use with Hoymiles inverters, our DTU is compatible with various models, including HM300, HM350, HM400, HM600, HM700, HM800, HM1200, HM1500, TSun 350, TSun 400, and TSun M800. Specifications *Product Name:ESP321 *Material:Metal *Size:as the picture shows *Color:black Package Content 1*ESP321 1*NRF24L01 1*Cable 1*Display Note 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data. _x000D_