2.4in Baby Monitor with Camera LCD Screen 2.4 GHz Wireless Voice Control 2 Way Audio for Infant AC100‑240V US Plug Item Type: Baby Monitor Material: ABS Screen Size: 2.4in LCD Display Screen Resolution: 320x240 RGB Image Resolution: 320x240 QVGA Video Frame Rate: 15-25FPS Signal Strength: Level 4 Volume Control: Level 5 Walkie Talkie: 2 Way Communication Voice Control: Automatic Transmission Frequency: 2.4GHz ISM Band How Wireless Works: FHSS Transmission Power: 19dBm CW Mode Transmission Speed: 3Mbps Transmission Range: Approx. 200-300m/218.7-328.1yd in Open Area Working Current: TX: 400mA MAX. Receive Sensitivity: -96dBm BER=1e-3 Charging Current: 120-200MA Audio Catch Speed: 16K Audio Frequency Response Range: 120Hz - 3KHz MIC Input: 35-50dB Total Harmonic Distortion: <5.0 Signal To Noise Ratio: 46dB Noise Ratio at Night: Approx. 2-3 Meters / 6.6-9.8ft Working Humidity: 20 - 80%RH Working Temperature: 0℃ - 45℃ Battery Type: 750mAh Lithium Battery x 1 (Built in)