1. Color CCD/CMOS camera, 4/5.6 (main monitor), 2.5 (monitor) color TFT display; 2. 30s sixteen-chord melody ring, 15s monitor if needed, 120s confidential conversation; 3. 3 kinds of ring available, 3-level volume adjustable, 4. Hand-free monitor...
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video/audio doorphone & wireless alarm system...
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