series RS30 To u ch Mo bi le Com puter Operating system Android 4.4 CPU Cortex 1.3 GHz Quad Core Processor Memory 8GB Flash / 1GB RAM Micro SD card slot with SDHC support (up to 32GB) Expansion Performance 2 SIM slots and 1 SAM slot SIM / SAM Replaceable and rechargeable 3.8V 3100 mAh Li-ion battery Operating power 8 to 10 hours Working hours Alert Tri-color LEDs, vibrator, speaker Interface supported USB 2.