The Trekk Outdoor Speaker & Wireless Powerbank offers built-in music controls and microphone, a 2x3-Watt speaker and 10-meter Bluetooth working range to play music up to 8 hours at maximum volume. This device features a IPX7 waterproof rating and the Bluetooth speaker can be submerged underwater for up to 30 minutes. Charge two devices at the same time using the built-in USB output or the built-in wireless charging power bank. The Trekk Outdoor Speaker & Wireless Powerbank features a rechargeable 8000mAh battery and Bluetooth version 5.0.