DS18B20 Temperature Sensor
$20
$50
HOSIDEN HLM8619
$55
$100
DHI-NVR4232-4KS2
$275
$305
Hikvision DS-2CD1141-I
$79
$85
P2.5 RGB Indoor 320*160mm 128*64 pixels 1/32 Scan 3in1 Full color LED Display module