Targethobby Flysky FGr4s V2 Receiver for Flysky Noble NB4 Rc Transmitter, Noble Pro Transmitter, 4 Channel AFHDS 3 - Pack of 2 Flysky Noble NB4 Noble Pro Transmitter Receiver FGr4s V2 The FGr4S uses AFHDS 3 (Third Generation Automatic Frequency Hopping Digital System). It uses a internal single antenna with two way transmission capabilities and is designed to be compact and easy to install. It can output standard PPM,PWM ?i-BUS and S.BUS. Product specification: Channels: 4 Model Type: Car/Boat Data Output: PPM/i-BUS/S.BUS/PWM RF: 2.4GHz Transmission Power: <20dBm(EU) RF Standard: AFHDS 3 Antenna: Built-in Antenna Input Power: 3.5V ? 8.4V Display: LED Indicator Online Update: Yes Dimensions: 25.5*22*17.3 mm Weight: 5.1g Package include: 2 x Flysky FGr4s V2 Receivers