A:Answer Hi Hman,
Thank you for the inquiry! To use the Stereo Pair function, 2 SRS-XB13 speakers are required. By connecting 2 speakers via Bluetooth connection, you can enjoy more powerful sound.
Enjoy big sound with the super-compact SRS-XB13 wireless speaker, featuring EXTRA BASS, an updated IP67 waterproof and dustproof design1,2, and up to 16 hours of battery life.3 Small enough to fit in a bag or cupholder, the XB13 also features a multiway strap to take it with you everywhere you go.
Regards,
David