GSM transmitter

6. Automatic identification net, short or long distance phone number above; International and domestic, muncipal, then call the prohibition set.

5. It is directly to allocate free of charge, such as 110, 119, 120 and so on; To provide lock, card lock, cell lock fuction for operators of fixed wireless access restrictions on platform.

4. Built-in billing module, the global rate of storage, automatic number identification and accurate billing. Rates can be fixed wireless access to platform to amend its surcharge fees, calls, call duration

3. Call to provide accurate anti-polarity, which can be accessed by billing device or the use of computer-billing device

2. Caller ID directly to show ordinary telephone display clock

1. Bring their own arbitrary set of billing device, single-user do not need to buy additional billing device,

good performance
3 years warranty