Akai Professional MPC Sample Standalone Portable Sampler, Sequencer and Effects Processor, with Rechargeable Battery, USB-C, Built-in Speaker and Microphone

Tangible Instruments Arpeggio portable synthesizer, arpeggiator, and sequencer with built-in speaker

Stylophone GENX-2 Portable Analogue Synthesizer with Built-in Speaker, LFO, Filter, Analogue Delay and CV/Gate Output | Synthesizer Keyboard | Synth Musical Instrument

Wireless Guitar System 2.4 GHz with 6 Channels Rechargeable Audio Wireless Guitar Transmitter Receiver for Bass Electric Instruments

BELTBOX 3.0: Vocal Dampener for Singers, Actors, Performers, Stress Relief. A Portable Warm-Up Room.