1688HA

1, the main features
* Button large font size, volume large, strong signal, long standby
* Dial-up convenience: shortcut keys (M1, M2, SOS) a key to allocate the same time with automatic dialing
* Locking convenience: side buttons keypad, a key lock
* Charge convenience: a unique intelligent charging management system, charging stand with the United States original intelligent charge management chip, the light changes through the  charger can charge the state to know and greatly facilitate use of older
* Lighting convenience: side buttons lighting, easy to use at night
* Limiting inbound, call restrictions, fixed dialing function
* Volume adjustable, selectable ring tones, real True singing (and Hyun) ringtones.
* Support machine card interlock, residential locks, lock network, the phone features   password protection
2, the basic functions
* Use the wireless industry module.
* Voice clarity, low noise, signal strength, quick grab line
* The Chinese show, user-friendly, easy to operate
* Supports automatic dial long-distance IP function
* Can send and receive Chinese text messages, call records function
* Has the intelligent fault detection system
* Support for random / fixed PIN lock the card and V2 \ V3 \ V4 post cards in support of   lock network lock cell
* Use high-gain antenna, the receiver sensitivity
* Wide voltage power supply (90v-246v), automatic charging management
* Built-in high capacity lithium battery
3, the technical parameters
* Working frequency: GSM900/DCS1800MHZ.
* Power supply voltage: 90V-264V, automatic charging management
* Receiving Sensitivity: <-104dBm
* Spurious emission limits: =- 30dBm
* Modulation: 0.3GMSK
* Bandwidth:> 200KHz
* Channel spacing: 25KHZ
* Frequency stability: ± 0.1ppm
* Operating Frequency: 900/1800MHz automatically switch
* Environmental Temperature: 0 ° C --- +40 ° C
* Operating humidity: 5% - 95%
* Frequency Range :885-915MHZ ,1710-1755MHZDetailed information can be sent as long as you need