Attention: Welcome to my shop We ship the product from China, the delivery time is 7-14 days product *2.4GHz wireless transmission *Outdoor distance up to 200 meters * 3.5-inch display screen, camera with shaking head function, 120 degrees up and down, 355 degrees left and right * Two-way intercom * Invisible light night vision function * Temperature display / built-in probe * Temperature alarm * One-to-four function (one receiver can be connected to four transmitters) * Image zoom in and out * Image digital panning * Multiple transmitter image preview function * Power saving mode (voice activated) * Cui Mian song playback * Adjustable volume and brightness * No signal alarm * Low battery alarm *Large capacity lithium battery 950mAH Product parameters: Frequency: 2400-2483.5 MHz Image sensor: 1/6 CMOS CMOS pixel: 640*480 Frequency: 2400-2483.5 MHz TFT LCD screen: 3.5" Effective Pixels: 320x240 Demodulation Mode: GFS Frame rate: up to 25 fps Power Adapter: Input: 100-240 V, 50/60Hz; Output: 5 V, 600 mA; Built-in lithium-ion battery: 1200mAh Standby time: up to 15 H in eco mode Transmission power: 18+/-1dBm Current consumption: 100 mA Display color: full color; Working range: up to 300M (without blocks) Operating temperature: 0 ~ 40C Humidity: 5-90% RH pack: 1x receiver * 1x transmitter * 2x Power Adapter * 1x Instruction Manual * 1x Wall Mounting Screw * 1x screw plug