Electric guitar, bass, electric blowpipe, electric violin, electric d , electric guzheng and other electroacoustic inst ents Just plug the mitter into an electric guitar/electric blowpipe/electronic keyboard and other electroacoustic inst ents, and the receiver into a playback device such as a speaker. Plug and play, simple to use; compact size and lightweight, easy to carry. Precautions for use: 1. Before use, please confirm the mitter and receiver connections (operate according to the instructions), make sure that the mitter is plugged into the inst ent and the receiver is plugged into the speaker, otherwise no sound will be mitted. 2. If there is noise or intermittent connection, it may be due to the following reasons: insufficient battery power; displacement of the battery due to portation (you can open the battery part and move the battery to the right); the distance is too far (within 15 meters, the effect is better. ); there is a strong interference source nearby. Color: Black Material: ABS Package Contents: 1 x receiver 2 x mitter Only the above package content, other products are not included. 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.