Perfectly-sized for your hand, pocket or desktop. The J300 features voice activation, fast play mode – so you can listen to audio 25% faster – & a dual tape speed function enabling you to get up to three hours of audio on a 90-minute microcassette. Variable control voice actuator for hands-free recording. Quick review lets you listen to what has just been recorded. Cue / Review makes for fast, easy message monitoring.External jacks provide easy connection for earphone, microphone & external power. Recording Functions: n/a; Activation / Review Functions: n/a; Foot / Hand Controls: n/a; Recording Time: n/a.