This Baby Monitor allows 2.4GHz wireless Audio Visual Transmission straight to the palm of your hand. Simply switch on the monitor to instantly see or hear your baby from a distance of up to 100m in open space. 6 Infra Red LED lights on the camera enable Night Vision monitoring,Watch over your baby in comfort and ease. Camera: 1.Built-in antenna input Impedance 50ohm 2.The frequency range is 2.41~2.47 GHz