Notes:
1.This firmware is only fit for B6.
2.Do not power off the device when upgrading.
3.Please unzip the file you downloaded and use the file ended with "bin" or "trx" to upgrade your device.

Update:
1.This version compatible with FCC standard.
2.Upgrade it to enable high output power feature.
3.The maximum output power value can be set to 26dBm.