Small, pocketable USB C Morse key trainer designed for practice and portable use. Compact and thin, it fits easily into a toolkit or pocket while providing audible and visual feedback to help users refine timing and technique. Key benefits Portable practice: Compact size makes it easy to carry and use anywhere, indoors or outdoors. Simple power options: USB Type C input lets you power the unit from phone chargers, laptop adapters, power banks, or computers. Effective learning tools: Auditory and visual output reinforce rhythm and timing to help beginners and experienced operators correct errors and build consistency. Broad compatibility: Supports vertical, horizontal, and semi automatic keys and works with all manual Morse keys without modification. Features Dual feedback: Sound and light signals provide clear realtime feedback on keying rhythm. Universal Type C power: Operates from common USB Type C power sources for reliable use in different environments. Compact dimensions: Approx. 35 x 17 mm (1.38 x 0.67 inch) for easy portability. Key support: Accepts vertical, horizontal, and semi automatic keys to match your preferred keying style. Durable for field use: Designed to function in a variety of settings where a manual Morse key is used. Suitable applications Athome practice: Use with a manual key to drill timing and accuracy during study sessions. Field or portable operations: Slip it in a bag or pocket and power from a power bank or laptop for onsite practice. Club or classroom training: Provide clear audio and visual cues during group lessons or demonstrations. Package contents 1 pc USB C Key Trainer Additional notes Size is approximate; please allow up to 1 mm variation due to manual measurement. Product color may differ slightly from images due to monitor differences.