Boss DR-01s, Virtual Percussionist, Rhythm accompanist especially for musicians with acoustic instruments, Built-in 4 ""speaker, Tempo: 40-300 BPM, Time Signature: 3/4, 4/4, 6/8, 24 voices polyphonic, 50 memory slots for rhythm combinations, Instruments: Shaker, Maracas, Bell, Whistle, Tambourine, Pandeiro, Claves, Cowbell, Triangle, Bongo, Hand clap, Paila, Conga, Cajon, Drums, Metronomes, Sound effects, 7 segment display, 24 bit, 7 watts output power, Connections: AUX IN, LINE OUT, CTL 1.2, DC IN, Dimensions (W x D x H): 210 x 143 x 127 mm, Weight (including battery): 900 g, Power adapter included / up to 10 hours of playing on battery power, Matching footswitch: Boss FS-5U / BOSS FS-6 / BOSS FS-7 (not included)