Rated power: 2*10W(8Ω), 2*20W(4Ω), Class D high-efficiency high-fidelity digital power amplifier Power supply: one for two (15V2A power adapter); one for four (15V3A power adapter), split power supply with amplifier and Bluetooth to ensure that users will not touch the mains and ensure the safety of electricity Input 1: Stereo wireless Bluetooth transmission, using Jerry AC6905, the sound is bright and warm and durable; the open wireless receiving distance is ≥12 meters Input 2: Unbalanced 3.5mm stereo headphone female plug Speaker unit: 6.5-inch full frequency, using Jiamusi paper paddle formula, bright sound, warm and durable Frequency response: 65Hz-18KHz Product size: Φ188*76mm Hole size: Φ170mm Material: ABS Weight: 0.9KG (main box); 0.7KG (secondary box)