Bluetooth Version: 5.0 (operational range up to 15 meters) Output Channel: 2.0 Chip Model: AP3050D Amplifier Class: Class D Audio Input: Bluetooth 5.0, AUX, USB flash drive Rated Output Power: 50W + 50W Frequency Response: 20Hz – 20kHz Working Voltage: DC 8V – DC 26V Recommended Operating Voltage: DC 19V Compatible Speaker Impedance: 4–8 ohms Note: 1. This is a DIY kit — the enclosure is provided as a material package requiring self-assembly. A screwdriver is included. 2. Thermal tape must be manually applied to the chip for heat dissipation. 3. The power switch on the board is a standby switch. When switched off, the unit enters low-power standby mode. For complete power disconnection, unplug the DC power adapter. Color: Black Material: PCB + Plastic + Metal Dimensions: 56 × 50 × 18 mm Package Includes: - 1 × Amplifier Board - 1 × Terminal Block - 1 × Enclosure Material Package Other accessories or components are not included. Note: Color appearance may vary slightly due to lighting conditions and screen settings. Measurement tolerance: ±1–3 cm.