Voice changer Kit 35 sold ER ABLE pieces features: • make your voice sound like a robot • add vibrato effect • use the 'pitch'-buttons and make your voice sound lower or higher • built-in microphone and power amplifier with volume control, just add a speaker • hours of fun! • great for parties, plays, recordings, games, prank Phone calls etc. Specifications: • speaker/line output • on/off switch • Max. Output power: 1.5W (4 ohm) • power supply: 9Vdc/300MA • dimensions: 3.0 inch x 1.8 inch.