Attention: Welcome to my shop! We ship the product from China, the delivery time is 7-14 days! product description*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 950mAHProduct parameters:Frequency: 2400-2483.5 MHzImage sensor: 1/6 CMOSCMOS pixel: 640*480Frequency: 2400-2483.5 MHzTFT LCD screen: 3.5"Effective Pixels: 320x240Demodulation Mode: GFSFrame rate: up to 25 fpsPower Adapter: Input: 100-240 V, 50/60Hz; Output: 5 V, 600 mA;Built-in lithium-ion battery: 1200mAhStandby time: up to 15 H in eco modeTransmission power: 18+/-1dBmCurrent consumption: 100 mADisplay color: full color;Working range: up to 300M (without blocks)Operating temperature: 0 ~ 40CHumidity: 5-90% RHpack:1x receiver* 1x transmitter* 2x Power Adapter* 1x Instruction Manual* 1x Wall Mounting Screw* 1x screw plug