Seeeduino LoRaWAN W/GPS... OTAA Example sketch... Setup for USA?

I am attempting to run the OTAA example sketch supplied with my Seeeduino LoRaWAN W/GPS board. This sketch has a setup(){} method which I show below. The values are for use in Europe. What values should I use in USA? (915 MHz channels…)

lora.setDeciveMode(LWOTAA);
lora.setDataRate(DR0, EU868);

lora.setChannel(0, 868.1);
lora.setChannel(1, 868.3);
lora.setChannel(2, 868.5);

lora.setReceiceWindowFirst(0, 868.1);
lora.setReceiceWindowSecond(869.5, DR3);

lora.setDutyCycle(false);
lora.setJoinDutyCycle(false);

lora.setPower(14);