new 2017 a6 gprs pro serial gprs gsm module core diy developemnt board replace sim900 sale

features: this is professional version serial gsm / gprs core development board based on gprs a6 module. it supports dual-band gsm/gprs network, available for gprs and sms message data remote transmission. the board features compact size and low current consumption. with power saving technique, the current consumption is as low as 3ma in sleep mode. it communicates with microcontroller via uart port, supports command including gsm 07.07, gsm 07.05 and ai-thinker enhanced at commands