The Happymodel 2.4GHz ELRS nano series receiver is an open source program based on ExpressLRS. Due to the low-latency and high-refresh-rate RF module, they are very comfortable for FPV race and Long Range FPV. And very suitable for Tiny whoop because of the ultra light and Nano size.
EP2_RX

Specifications:
Type: ISM
ESP8285 MCU
SX1280IMLTRT RF Module
SMD Ceramic antenna
Frequency Range: 2400 MHz to 2500 MHz
Maximum receive refresh rate: 1000Hz
Minimum receiver refresh rate: 25Hz
Working voltage: 5v
Weight: 0.44gram
Dimension: 10mm*10mm*6mm
Peak gain: 3.7dB

Package Includes:
1 x RX