3-channel Bluetooth
Supports input DC 5.0V, 1A, micro-USB
Supports 10/100 Ethernet with 802.3af PoE
Supports firmware upgrade over-the-air
Supports HTTP(support 
SSL/TLS)/MQTT(support SSL/TLS)
Operating temperature:-10~+50℃
Each can cover 1000 e-labels within 150㎡