Roland electronic drum TD-20X sound module. There are small scratches on the body, but overall it is in good condition. The liquid crystal is thin at first after turning on the power, but then it gradually returns to normal. After about 10 minutes, it will be reflected beautifully and stably. The 3 round knobs on the upper right have been replaced with Roland genuine new knobs used in the TD-30. Good operational sensitivity. MIX IN, MASTER OUT, PHONES, KIK, SNR, T1, T2, T3, T4, CR1, CR2, HH, HH-C, RD, RDE, AUX1, AUX2, AUX3, AUX4 all function normally. The fader and the three black volume controls on the upper right are also in good condition. Number of drum kits: 99 Ver 2.51 Instruction manual (printed from Roland HP), power cord, and mounting plate are included.