Experience superior sound quality with the for S51 Pro, a robust 40W wireless speaker designed for outdoor enthusiasts. This portable subwoofer speaker is not only powerful but also features an IPX6 waterproof rating, ensuring it withstands any weather conditions. Dual pairing technology allows you to connect two for S51 Pro speakers for amplified sound, perfect for any outdoor gathering. The long-lasting 5200mAh battery ensures you enjoy uninterrupted music for hours. Whether you're at a beach , camping, or just chilling in your backyard, the for S51 Pro is your ultimate outdoor companion. Model No: S51 Pro Bluetooth Speaker Number of speakers: 2 Speaker Diameter: 57mmx2 4Ohm 20Wx2 Standby time: 30 days and Battery capacity: built-in 5200 mAh Power: 40W with good bass Playing time: 6-7 hours Charging time: about 4-5 hours Communication distance: barrier-free 10-15 metres Due to different batches, there may be differences in product appearance and printed text, which not affect use Colour:Black Material:ABS Package Contents: 1 x Speaker 1 x Charging cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.