BUY EW-610B https://www.utsource.net/itm/p/11297071.html
HALL IC EW-610B SOT->89 marking W10B
Description: The EW-610B is a low power, low voltage, single-chip, low-noise, low-distortion, stereo audio power amplifier IC from AKM Semiconductor. Features: Low power consumption: 0.4W (typical) Low voltage operation: 2.7V to 5.5V Low noise: -95dB (typical) Low distortion: 0.01% (typical) Output power: 0.5W (typical) Stereo audio power amplifier Built-in protection circuits Small package: SOT-89 Applications: Portable audio devices Mobile phones MP3 players Digital audio players Portable media players Portable gaming devices (For reference only)