EMAX E8 2.4GHz 8CH Dual-frequency Left Right Switch Mode2 Radio Transmitter Built-in USB Charge Wired Trainer Interface for EMAX Tinyhawk III RC Drone OVERVIEW: E8 Transmitter is a new wireless controller released by EMAX.It has a built-in 2.4GHz dual-bandantenna and 2.4GHz RF module.The RF module supports 8 channels.The channel range is configurable and compatible with most receivers on the market.It is equipped with a wired trainer interface and simulation.The Mode of the device can switch between left and right hand modes,and the ergonomic design can bring a good user experience paired to gether with a built in battery which can be charged via USB. Specification: (Manual) Brand Name: EMAX Item Name: E8 Radio Transmitter Model: E8 Weight: 260g (without battery) Size: L*W*H=150x140x45mm Working voltage: 3.7V-4.2V Channel: 8 channels, all channels can be configured External interface: Micro USB interface, 3.5mm audio interface (wired trainer interface) Transmitting module: built-in 2.4GHz dual-frequency FPC antenna, 2.4GHz RF transmitting module Working frequency band: 2.4GHz (2400MHz-2483.5MHz) Maximum output power: 22dbm Charging system: Built-in USB 5V--1A linear lithium-ion battery charging system Mode switching: D8 mode: press the power switch and the "L1+" button at the same time: turn on and enter D8 mode, then the mode indicator will turn solid red. D16 mode: press the power switch and the "L2-" button at the same time: turn on and enter D16 mode, then the mode indicator light will turn solid green. D16 LBT mode: Press the power switch and the "L4+" button at the same time: Turn on the controller and enter D16 LBT mode, then the mode indicator light will turn solid yellow Battery & Charging: The E8 Transmitter is compatible with a 18650 battery, with a working voltage of 4.3V-3.3V. When you need to reinstall the battery, remove the battery compartment cover and install the battery according to the correct polarity (the negative pole is on the spring side of the battery compartment). Confirm that the battery compartment cover and the battery compartment are perfectly matched then push forward until locked. If the battery is not installed correctly, charging and starting cannot be performed correctly. The remote control is charged with the micro USB at the bottom. Charging system and battery installation instructions: Power charging indicator status: When Red LED is solid: charging is in progress.