Firmware infos :

 build date               : Thu May 31 10:48:54 CST 2018
 build description        : SURF-user 7.0 NRD90M 1527734934 release-keys
 build id                 : NRD90M
 build display id         : ECHO_SURF_V10_20180531
 platform                 : SP7731C
 product brand            : ECHO
 product device           : SURF
 product manufacturer     : revoview
 product model            : SURF
 os version               : 7.0 

 build date               : Wed May  9 19:06:48 CST 2018
 build description        : SURF-user 7.0 NRD90M 1525864008 release-keys
 build id                 : NRD90M
 build display id         : ECHO_SURF_V10_20180509
 platform                 : SP7731C
 product brand            : ECHO
 product device           : SURF
 product manufacturer     : revoview
 product model            : SURF
 os version               : 7.0

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