Hand Key Oscillator CW Key Trainer Automatic Key Exerciser Automatic Key Controller Can Adjust The Transmission Speed _x000D_ _x000D_ _x000D_ Hand Key Oscillator CW Key Trainer Automatic Key Exerciser Automatic Key Controller Can Adjust The Transmission Speed _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ This is a 2-in-1 CW keyer that can be used as a keyer or a key trainer, and when used as a key trainer, it supports both hand and automatic keys. _x000D_ The product is multi-functional, both a stand-alone version of the practitioner, directly plug the key can be practiced. It is also an automatic key controller that can be connected to radio stations, Automatic keys, hand keys support single-machine practice. _x000D_ Practice transmission speed can be adjusted. Press and hold the button, press the key, adjust the transmission speed! _x000D_ The interface of the product is 3.5mm. _x000D_ The product uses electronic power supply, easy to carry and use. The product consumes very little energy. _x000D_ _x000D_ Note:Due to different production batches, there are differences in printing/appearance, which does not affect use. _x000D_ Power Supply:1 x button battery(Not included batteries) _x000D_ Colour:Green _x000D_ Material:PCB _x000D_ _x000D_ Package Contents: _x000D_ 1 * CW Trainer _x000D_ _x000D_ Only the above package content, other products are not included. _x000D_ Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_