Connetech Wearable Necklack Mini Wireless Bluetooth Speaker Buit-in Microphone for Hand-free Calling, with Tf Card Slot, with Long Strap Ultra-portable for Outdoor Sports 2.1 Bluetooth Version Colorful Rechargeable Speaker (White) Built-in rechargeable battery, capacity 500mAh. TF card support, easy to operate. The perfect Bluetooth speaker for iPhone, iPad, iPod, MacBook, Samsung Galaxy s4 and s3, Galaxy Note Light weight, easy to carry. Terrific convenient for travel, climbing, hiking, walking, cycling,with the lace, you can put it on your bag, bike, even you can ware it like a necklace, its shining color will make you outstanding. Dustproof, Rechargeabe, fit for both indoor and outdoor exercise