wireless door chime SD card Transmission distance reaches 300meter

KDB300 wireless door chime Introduction:
1.         Adopt 2.4G ISM digital public frequency brand: 2402~2483.5MHz.
2.         Transmitting power 16~20dBm, receiving sensitivity: 90~100dBm.
3.         Intercom speech pattern.
4.         Image data and voice data synchronous transmission.
5.         Outdoor machine adopts 300,000pixels camera, indoor machine adopts 3.5’’ TFT display screen to show vivid and clear images.
6.         SD card for video and picture storage (TF card, auto circulation storage, Max: 4G supported).
7.         Power supply: lithium battery 3.7V for indoor machine, USB interface for charge and downloading.
Chargeable lithium battery 3.7V for outdoor machine, adapter: 5V 1A.
8.         Adopt AFH self-adaption frequency hopping technology, which allows the machine work well along with sharing 2.4G frequency band with WIFI and Bluetooth simultaneously.
9.         Transmission distance reaches 300meters at an open space.
10.     2 to 3 function（2 outdoor units and 3 handsets）could be achieved, handset could call to each other.
11.     Outdoor machine adopts tamper alarm function..
12.     Images adopts MJPEG compress mode, one-way wireless transmission could reach 12fps.
13.     Transmission channel, synchronization channel and 40Bits code generate at random.
14.     Outdoor machine adopts night vision function (infrared lamp or LED flash) controlled by indoor machine.
15.     Outdoor machine adopts unlocking door function，power for electric latch: 12V (User Supply).
16.     CE/CCC/Fcc/R&NTTE/RoHS approved.
              
 

Specification:
	Power	Specific lithium battery BP-6M(1100mAh）
	Consumption	400mA
	Outline dimension	134*74*31mm
	Weight	122g
	Environmental condition	Temperature: -10℃~+50℃
	Waterproof grade	IP55
Outdoor machine	Placement	Hang on outwall
	Surface material	ABS & hardware accessories
	Camera	300,000pixels
	View angle	120° wide angle
	Night vision pattern	2 leds or IR lamp
	Working time	3hours continuously
	Standby time	1000hours
	Charge time	3hours
	External power	DC5V 1A
	Power	Specific lithium battery BP-6M(1100mAh）
	Consumption	400mA
	Outline dimension	126*84*20mm
	Weight	110g
	Environmental condition	Temperature: -0℃~+40℃
Indoor machine	Placement	Hang on wall or table style
	LCD size	3.5\" TFT color screen
	Wireless communication mode	2.4GHz
	Working time	2hours continuously
	Standby time	100hours
	Charge time	3hours
	External power	DC5V 1A
	Application distance	About 300m in open space