Stereo 0.7 Watt (Each Channel 0.7 Watt) Amplifier Module.
This item has been assembled, and electrical test passed.
Based on NJM2073D IC design.
No turn-on noise.
Low operating current, low operating voltage, suitable battery supply solutions.
High-quality 105°C electrolytic capacitors and polyester film capacitors.
High-quality terminal blocks easy connection wire.
Thickness 1.6mm FR-4 fiber glass PCB (double layer).

Specifications:
Operating Voltage: 1.8 to 15V DC. 
Operating Current: Power ON 6 to 9mA (Without Load).
Power OFF 0mA.
Input Impedance: 10K OHM.
Voltage Gain: 44 +/-3 dB.
Output Power: Dual 0.7 Watt (@9V DC, THD=1%, 8 OHM Load).
Frequency Response: 60 Hz to 100 KHz. (-3dB).
THD: 0.2% (@6V DC, 0.2 Watt, 8 OHM Load).
Channel Separation: 50dB (@1KHz).
Size:
PCB Size: 50 x 50 mm (1 x 1 inch).
Module Size(W x L x H): 50 x 65 x 25 mm (2 x 2.6 x 1 inch)

Datasheet: