... language:English,French,German,Italian,SpanishBattery Operating Time:80 minutesBattery charging time: 2.5~3 hoursBuilt-in Speaker:8R/1W*1Power ... DC5V/2.5A, 3.5*1.3*6MMLED Indication :Orange-charging, Green-full chargedOperation temperature: 0°C~+60°CStorage temperature:-10 ... focal length wheel to adjust focal length3.Q:Why in charging completed case, my equipment can't use long time?A ...