20pcs SIM800C Dual-band Quad-band GSM GPRS Voice SMS Data Wireless Transceiver Module

Main Characteristics Quad band 850 900 1800 1900MHzGPRS multi slot class 12 10GPRS mobile station class BMeet the GSM 2 2 standardClass 4 2 W 850 900 MHz Class 1 1 W 1800 1900MHz Controlled by AT commands 3GPP TS 27 007 27 005 and SIMCOM Enhanced AT Command Set Low power consumptionSIM application kitSupply voltage range 3 4 4 4VOperating temperature range 40 to 85 °C Voice TricodecHalf rate HR full rate FR Enhanced Full Rate EFR AMRHalf rate HR full rate FR Support suppression algorithm Data TransmissionGPRS class 12 Maximum 85 6 kbps downstream rate Support PBCCHCoding schemes CS 1 2 3 4PPP stack USSD Interface42 SMT pinsOne way analog audio interfaceSupport RTCUSB Serial interfaceSIM card interface 3V 1 8V GPIO ADCGSM antenna padBT antenna pad SMSPoint to point MO and MT SMS broadcast Text and PDU mode CompatibilityAT cellular command interface Software Features0710 MUX protocolEmbedded TCP UDP protocolFTP HTTPMMSe mailDTMF detectionInterference detectionrecordingSSLPackage included 20 x SIM800C Dual band Quad band GSM GPRS Voice SMS Data Wireless Transceiver Module