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The Select 4 Go pairs a 1.75-inch 5W full-range speaker driver with a passive radiator to help bolster the intensity of lower frequencies. That\u2019s only a slightly smaller speaker than you\u2019ll find inside the pricier Miniroll<\/a>, which has a claimed 12 hours of battery life. Soundcore says<\/a> the Select 4 Go has up to 20 hours of playtime on a full charge with the volume set at 40 percent and when using its standard EQ mode.<\/p>\n<\/div>\n It has a waterproof IPX67 rating and will even float when used in a pool, but Soundcore warns that you\u2019ll want to make sure the waterproof cover for its USB-C charging port is tightly secured before using the speaker near water. <\/p>\n<\/div>\n The Bluetooth range is rated at 30 meters, and two of the Select 4 Go speakers can be paired to produce stereo sound. Other Soundcore products, including the even lighter $40.99 Soundcore Mini 3<\/a>, allow for over 100 speakers to be paired and all play in sync at the same time. If that\u2019s an important feature to you, you\u2019ll need to spend a bit more.<\/p>\n<\/div>\n We haven\u2019t tested the speaker and can\u2019t vouch for its sound quality, but for $24.99, you\u2019re going to get what you pay for: a durable wireless speaker that should at least sound better than playing music through your smartphone\u2019s speaker.<\/p>\n<\/div>\n