Humidity range: 20% -95% Transmission Power. To avoid the 2.4Ghz radio signal interference.
Please always keep your model in sight and within 300m and make sure there are no other signals around, cause they may block the RF signal and lead to loss of control. Never grip the transmitter antenna during operation. It significantly degrades signal quality and strength and may cause loss of control. Package List: 1 Noble NB4+ Transmitter 1 FGR4S receiver 1 USB cable 1 Accessories kit Package size: 272318cm Package Weight: 1182g.