Battery powered intercom door phone system

Battery powered intercom door phone system Range in free field 300 meters

2.4GHz Digital Wireless Video Door Phone* DIY Easy to Install * Able to view, talk and unlock the main entrance from any room in your home * Portable size to carry * 2.4GHZ wireless video intercom and surveillance * Portable handfree video color monitor * Infra-red camera on outside call station - see callers at night * Intelligent remote unlock for visitors/guest * Rechargeable battery via mini-USB interface, standby status for 72 hours. * Able to intercom between each portable monitor * 300 meters transmission distance (without interferences) * Full duplex audio mode * 2.4 inch TFT-LCD portable indoor monitor * IR camera (night vision)* Expand to a 2-way system by adding door call station and a portable handset * 12 selectable ring tones Door Camera Station:Image Sensor - 1/4" CMOS Minimum Illumination - 0 LUX (IR on) Power - DC5V/1A Current - 20mA~30mA (standby), 190 mA (operation) Audio Input - 12-digits digital audio signal, DAC interface, 8Kbps sampling speed rate Image Compression - MJPEG compression Transmission Power - 16~20dBm Ringing Tone - 12 Ringtone Choices Dimensions (H x W x D) - 5" x 3-3/4" x 1-1/4" (127mm x 95mm x 37mm) Handheld Monitor:Screen - 2.4 inch TFT LCD Effective Pixels - 320 x 240 Power Source - DC4.5V/1A (rechargeable battery operated) Battery Charging Time - For the 1st time, 7 - 10 hours, afterwards around 4 hours USB Port - For Battery Charge Current - 20mA~30mA/3.7V (standby), 170mA (Operation) Receiving Sensitivity 0 -90dBm Dimensions (H x W x D) - 4" x 2-5/8" x 3/4" (102.5mm x 66.5mm x 18mm)

Battery powered intercom door phone system