Brookstone Big Blue Unplugged Wireless Indoor-Outdoor Bluetooth Speaker Pair easily with Bluetooth enabled smartphones, tablets and music players NFC pairing--simply touch your device to Big Blue UnpluggedTM for instant wireless pairing Pair2TM technology lets you wirelessly pair two Big Blue Unplugged speakers for left/right or dual stereo sound Weatherproof and water resistant for big sound, indoors or out Rechargeable battery lasts up to 7 hours on a single charge