Fangrui Product Details 1.the A9g Development Board Is A Versatile Development Board Based On Emcs A9g Gprs / Gsm + Gps / Bds Module That Can Be Used To Validate The Basic Communication Functions And Peripheral Functions Of The A9g Module. 2.a9g Development Board With The Basic Phone / Sms, Gprs Networking Communications, Gps / Bds Dual-mode Positioning Capabilities. 3.a9g Development Board Contains A Lithium Battery Charging Management, Microphone, Speaker Interface, Usb Communication Interface, Multiple User Keys / Led, Tf Card Slot, Accelerometer, Spi Interface, I2c2 Interface, Adc Interface. 4.a9g Development Board Camera Expansion Board, An External 30w / 200w Camera. 5.a9g Development Board Slot Machine Expansion Board, Can Add A Traditional Slot Machine. A9g Can Be Used For A Variety Of Peripheral Prototyping Verification:use Gprs + Gps, As Well As Acceleration Sensors For Vehicle Immobilizer. Remote Monitoring Intercom Using Gsm And Microphone / Speakers Smart Watch With 1.54inch Capacitive Touch Screen Using Gprs / Gs