Cctv & Dvr Cctv Accessories Alarm Alarm Accessories Promotion Package ALARM ACCESSORIES >> GSM Backup Battey Module Model : GSM Backup Backup Battery Module Functions *  Multicolour backlight display ( e.g:blue, green ) * Can dial the local calls , mobile calls , international calls and special free calls * Supports modem mode * No need to dial area code when calling local numbers Specifications  Networks Support GSM 900 / 1800Mhz Frequency range GSM 900HMz ( Transmits : 890-915MHz , Receiver : 935-960Mhz GSM 1800HMz ( Transmits : 1710-1785MHz , Receiver : 1805-1880Mhz Voltage DC 9V / DC 12V Stand by hours 48 Hours Talk time 2-6 Hours Charging time 6 Hours Power consumption Static<25MA                   emission<500MA Peak Power consumption 0.25W / 0.5W Receive sensitivity -104db Antenna increment All directions : 5.0db              Certain / Selection : 12db

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