The SU-03T voice recognition control module provides users with a convenient and inexpensive serial port offline voice recognition solution, which can be widely and quickly applied to smart homes, various smart small appliances, 86-type set-top boxes, toys, lamps and other products that require voice control. Name: SU-03T Voice Recognition Control Module Operating Voltage: 33V-5V Interface Type: PH2.0 4P Terminal Mounting Method: Screw Fixing Mounting Hole Parameters: Hole Diameter 32mm/4.7mm, Hole Spacing 36mm/24mm Module Dimensions: 51*32mm Signal Type: Digital/Analog Signal Communication Protocol: i2C Interface Description: GND connects to the negative power supply pin G, VCC connects to the positive power supply pin V, TX signal transmit pin, RX signal receive pin Color: Black Material: plastic Package Contents: 1*Voice Control Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.