Don't mention it. I'm glad to answer your question.
1、sorry I made a mistake,ET12 had RSSI reading too.
2、yes,only english and chinese voices,What other languages do you need?
3、I like that function too………………But………………
4、Don't worry, it won't . I've been using WFLY 9 for 10 years,I trust WFLY.
5、yes,no SD card port and you're right,the USB port on back is used for upgrading.
6、Most of the ET07 or ET12 user want a manual in chinese……I'm not a staff of WFLY,so……sorry……
but I can take some picture for you,please wait a few days.
7、working voltage is 3.5V—13V(1S—3S Lipo),Including 2S,Receiver RF209S is the same。
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