DAOKI 5PCS 315Mhz RF transmitter and receiver link kit for Arduino/ARM/MCU/Raspberry pi Wireless TX Working voltage: 3V-12V. Working current: 20-28mA. Resonance mode: sound wave resonance (SAW) Modulation mode: ASK /OOK RX Working voltage: 5.0VDC. Static current:4MA Working principle: single chip superregeneration receiving