The robust, portable SRS-XB13 is easy to carry with its special strap. This small speaker packs a punch: with Extra Bass and a sound distribution processor, it delivers rich sound. A passive radiator, along with a full-range speaker, optimizes low frequencies for a deeper bass. The sturdy housing and carrying strap make this speaker the perfect companion for any situation. You can hang it on your backpack, wrist, or even on an umbrella on hot days, directing the sound wherever you are. This compact speaker surprises with fantastic surround sound. The sound distribution processor fills any space with sound using its DSP technology. The speaker is waterproof and dustproof with an IP67 rating, sounding just as good outdoors as it does indoors. Whether you're sunbathing at the pool, by the river, or in the park, you won't have to miss out on your music. The battery lasts up to 16 hours for long party enjoyment. A new battery indicator shows you directly on your smartphone when it's time to recharge your speaker. Need to make a call? No problem. With the speaker's built-in microphone, you can make hands-free calls, whether you're at home or on the go.