USB disk gsm bug with call back

• Frequency: GSM 900/1800MHz
• Transmission Distance: Non-limit
• Card Compatible: GSM sim card
• Receive Sensitivity: ±10K
• USB 2.0/1.1 supported
• No external power required
• USB flash disk design
• Sensitive Range: 0-10m
• Operation temperature range: -10 ~ +50C
• Operation humidity: 15 85% RH
• In retail packaging