YES it has just been released. 

Maybe if it was quiet enough or the children are under 10 and sensitive to loudspeakers. If they are 10 or older and it is windy or near a busy road you should get the Partybox 100, 110, Partybox 200, 300, 310, or the Boombox 2. The JBL On the Go Partybox may be a great option, as it is around the same price as the Xtreme 3 but it comes with a microphone, and is louder and bigger making it a convenient option as you have the ability to announce the names of teams or athletes with the microphone etc.

Just avoid very hot hot tubs and soap, as heat and soapy water can damage the speaker. Soap decreases the viscosity of water, I killed a 100 meter water resistant watch by showering without and washing it with soapy water. Bubble bath, for example, should be avoided if possible and rinsed immediately if you drop it in there by accident.

Please ensure the JBL Xtreme 3 has a sufficient charge throughout the software/firmware update. You can also try to update your speaker while charging or connected to a power supply. It is best to leave the speaker while updating without doing anything to it to prevent the update from interrupting. Alternatively, you may try to use a different device to update the software to see if the issue happens across multiple devices. If you need more help, please contact our customer support for us to work with you directly.

Thank you for your question. The dimensions (W x H x D) are 298.5 x 136 x 134 mm / 11.75 x 5.35 x 5.28" Should you wish to receive further support, you may contact the Harman Customer Support team by telephone, email or chat in order to receive direct assistance. Please see https://uk.harmanaudio.com/support-contact.html#ns  for further details.  Thank you.

Although turned to 60 hertz, this speaker can play down to 44 htz. The main drivers react down to 36 or 35 Hertz, but it isn't audible because the box is not tuned to such low frequency. Such a small speaker rarely can audibly play notes lower than 35 htz because the size of the speaker is too small to move enough air for your ears to hear, as your ears are less sensitive to lower frequencies and the power required increases exponentially. If it was capable of playing music so deep, it may have trouble with battery life, driver endurance, passive radiator endurance, and trouble playing higher bass notes from 50-90 htz. No speaker on the market gets 20 hertz at this small size. Speakers that claim such sensitivity are not actually reproducing the sound and a test at those frequencies can prove it. I do not work for JBL.

It is out now is US and Europe

Thank you for your question. We invite you to contact the Harman Customer Support team by telephone, email or chat in order to receive direct assistance. Please see harmanaudio.com/support-contact.html for further details. Thank you.