Weight: Approx. 16.9 oz (475 g) Power Supply: AC 100 V (50 Hz/60 Hz) Call method: Automatic voice switching system Power consumption: Standby approx. 1.7W / Operating approx. 4W Installation Method: Exposed wall mounting (wall mounting hardware included) Screen Display: 3.5-inch TFT color LCD display Operating Environment: Ambient Temperature: 32 - 104F (0 - 40C), Humidity: Less than 90% Dimensions (H x W x D): 7.3 x 5.6 x 0.9 inches (186 x 143 x 23.5 mm) (excluding protru VL-V632K Extension Monitor for TV Intercom (Power Cord Type, Direct Connection)