Key Features:
● Android 8.1 system
● 4-inch display, 480 * 480 resolution capacitive touch screen
● ZigBee gateway supporting graffiti
● power supply mode: AC 110-250vc / 12v-24v
● speaker output power: 2 * 15W (digital power amplifier) / analog audio output
● one set of audio input; Output a group
● 485: output a group
● timing output: one group
● Bluetooth: support