How to Use: 1. The control method has been redesigned, and there is no sleep mode anymore. Now the tuner either flashes on the display for 5 minutes after being disturbed, or turns off after 30 minutes if you don't touch it and the transmitter doesn't turn on. During these 30 minutes, the tuner constantly monitors the power supply and immediately lights up the display when needed. The current consumption in this monitoring mode is 4mA. A long press of the button now turns the device on and off. 2. Use for Icom protocol to achieve external control and work in both directions. That is, when the tuner button is pressed, the transceiver automatically generates a carrier for tuning, and when switching from one frequency band to another, the transceiver initiates the tuning of the tuner. When you press the external tuner control button on the transceiver, the tuner will automatically run (if ON) or reset (if OFF). Specification: Item Type: Automatic Antenna Tuner Material: Aluminum Alloy, Iron, Copper, NPO Material Power: Minimum 1W, Maximum 15W Screen: 0.91in Organic Light Emitting Diode Battery Specification: 14500 850mAh lithium battery x 2 (built in battery) Current Consumption: Working Mode: 12mAh Sleep Mode: 170μA Shutdown State: 37μA Package List: 1 x Antenna Tuner