Wireless Serise Connection:TWS function lets you pair 4 speakers for a powerful surround sound.(the HOST speaker and SUB speaker will automatically link with each other within 6 seconds after you turn on both, simple and easy to use) 100FT RANGE:Advanced 5.0 ensures more stable and instant pairing compared to 4.2 and lower; maintains a strong connection up to 100 ft unobstructed away from your device; 3.5mm aux in jack for connecting devices