They are model GS-10 by TIC corp.
I gave them a listen yesterday.
They're sufficient for providing ambience outdoors but certainly not for critical listening.
Sound Dispersion: 360° full range sound
Woofer: 4" injection molded PP cone Butyl rubber surround
Cabinetry: Formulated ABS
Grill: Formulated ABS
Frequency Response: 90Hz – 18kHz
Sensitivity @1W/1m: 83db ±3db
Continuous/ Peak: 25 / 50W