WBK-M V2 Specifications

Working Voltage: 9 - 18V
Wireless Technology:  2.4 GHz (802.11 b/g/n)
Wireless Range: Up to 165 feet (50 Meters)
RCA Input Voltage:  5V
Number of Channels: MONO
Frequency Response: 10 - 20KHz
Battery Capacity: 1000 mAH
Display: 0.96" OLED Monochrome
Charging Port: USB-C
Auto Sleep: OFF, 15s ,30s, 1m, 5m, 15m, 30m, 
Volume Steps: 100, 50, 33, 25, 20
Voltmeter calibration:  0.01V +- Voltage Calibration
BASE Signal Indication: LED Indicator
BASE Dimensions: Height: 1.55" - Width: 3.8" - Depth: 1.9"