Description: Receiver specifications:Built-in Mic Built -in Lithium
battery working 3 hours Changing indicating
light Power supply: AC - DC
adapter (DC +6V 800mA) Consumption current: 400mA Power consumption: approx. 3W Operation temperature: 1) 10 1) +50°C / +14 1) + 122°F Storage temperature: 1) 40 1) +85°C / 1) 40 1) + 185°F