For ELRS Mini TX Module 24GHz OLED Screen Cooling Fan Mini Module for Mambo X9D Precautions:1. Do not connect 3S or above batteries to the Mini tuner. Otherwise, permanent damage will be caused 2. Before powering on the Mini tuner, please install the matching antenna. Otherwise, the tuner PA chip will be damaged. Description: RF TX module is based on the ExpressLRS project, an open-source RC link for RC applications. ExpressLRS to achieve the best possible link performance in both speeds, latency, and range. This makes ExpressLRS one of the fastest RC links available while still offering long-range performance. Specification: Packet refresh rate: 25Hz/50Hz/150Hz/250Hz/500Hz (2.4GHz) 2.4Ghz RF output power: 25mw/50mw/100mW/250mW/500mW Frequency bands (Mini RF Module 2.4G version): 2.4GHz Have Wifi Have OLED Screen Due to different batches, there may be differences in the appearance, color, and printing of the product, which will not affect its use. Version: 2.4GHz Material: plastic colour: white Package Contents: 1 x TX Module Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.