Features: Product Model: FS-GR3E PWM channels: 3 Wireless frequency: 2.4GHz Wireless protocol: AFHDS Range: 100 ～ 200m (ground) Antenna type: single antenna (150mm) Power: 4 - 6V RSSI: Not supported Data port: PWM Temperature range: 0 ℃ — + 60 ℃ Humidity range: 20% -95% Online update: No Weight : 5g ANT lenth : 26mm Size : 37.6*22.3*13mm Color : gray semi-transparent Certificate : CE FCC Package Includes: 5x FS-GR3E Receiver   Notes: the receiver cannot be powered by more than 6V. The actual battery voltage sometimes exceeds 6V during use, which causes damage to the receiver. Therefore, we recommend using 5V BEC