Features: 1.Hyperspeed wireless receiver to achieve 4000 Hz polling rate, it offers up to 4 times faster data transfer speed than standard 1000 Hz polling rate 2.Through the 4K wireless receiver, the mouse report rate can be increased to 4000Hz at the highest.Supports 4000 or 2000 or 1000Hz polling rate, with a minimized latency of 0.25 or 0.5 or 1ms 3.The Battery level indicator at the top of receiver displays different colors depending on the amount of power remaining,take charge of for uninterrupted gaming 4.Easy pairing, through PNP technology, after pairing once, it can be plug-and-play with the corresponding mouse on other computers without the need for a permanent HUB. 5.Note: The receiver is only for Dragonfly F1proandFor Dragonfly F1pro max Product parameters: suitable model: Dragonfly F1pro or F1promax By using the Dragonfly 4K wireless receiver, the maximum mouse return rate can be increased to 4000Hz. Under extreme performance, the data transmission speed can reach four times that of traditional solutions, with lower latency and greater confidence in winning. Of course, it can also be set to a preset return rate of 2000Hz to achieve a balance between performance and power consumption. Material: plastic colour: black Package Contents: 1 x wireless mouse receiver 1 x Chinese and English instructions 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.