Frequency range: 2400MHz to 2480MHz Maximum receiving refresh rate: 500Hz/F1000Hz Minimum receiving refresh rate: 25Hz Working voltage: 5v RP1 specifications Name:RP1 Nano Receiver Type:ISM Microcontroller: ESP8285 chip:SX12801MLTRT Antenna: 65mm 2.4ghz T antenna Weight: 2.2g (including antenna) Size:13mm x 11mm x 3mm Firmware version: ExpressLRS v2.4 pre-installed Firmware Target: RP1/2 2400 RX Bus interface:CRSF The appearance, color, and printing of the product from batch to batch, but this does not affect use. Material: PCB colour: black Package Contents: 1 x Receiver 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.