1. Easy to install, maintain;2. Allow PIN code entering and reciprocal phone-card lock;3. optimized circuit directly connecting the exchange device;4. Polarity reversal signal for metering;5. 3.5dBi gain antenna;6. Compatible to PABX;7. Suitable for call termination of ISP;8. Incoming call reminder, time display;Eu versions: (Support countries in , Southeast , the Middle , Oceania, Europe, Latin America, etc. confirm whether the following frequency bands are compatible with your country purchasing, )LTE FDD : B1 / B3 / B7 / B8 / B20 / B28A.LTE TDD : B38 / B40 / B41WCDMA : B1 / B8GSM : B3 / B8Netherlands 4G: Band 1,3,7,8,20. Frequency 2100/1800/2600/900/200MhzIsrael 4G Band 1,3,5,28,32. Frequency 2100,1800,850,700,1500MhzJapan 4G Band 28,8,11,1,41 700/900/1500/2100/2500MHz 4G Band 3,5,40 Frequency 1800/850/2300MHZ 4G Band 3,20,7,1 Frequency 1800/800/2600/2100MHZPlug Type :EU Plug,it applies to Indonesia, , , , and so on.Voltage: AC100-240VColour:WhiteMaterial:plasticPackage Contents:1 x Wireless terminal1 adapterOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.