SimcomCONNECTOR, FOR SIM508, SIM548, GSM/GPRS/GPS MODULE; No. of Channels:20Channels; Protocol:GSM, GPRS; Supply Voltage Max:5.5V; Frequency RF:1575.24MHz; Module Interface:-; Product Range:-; Accessory Type:Connector for SIM508/SIM548 ;RoHS Compliant: Yes