1. Suitable for GSM 900/1800MHz or GSM 850/1900/1800MHz2. Making & answering calls after connecting to telephone set3. Available to connect with telephone set, Billing machine, PBX etc4. Bar incoming call or outcall5. Support reverse polarity6. Supports the functions of redialing and hands-free7. Voice adjustment of calling in and out, multi-lever volume to be chosen8. Caller ID9. Featured with signal intensity indicator, working status indicator, breakdown indicator, etc10. Built-in PIN code protection featured with locking device/card/networkTechnique Parameters: Working FrequencyGSM 900/1800MHz orGSM 850/1900/1800MHz Power Consumption:
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