SIO Capsule-Shaped Dual-Speaker Wireless Bluetooth Speaker System with TF Card Slot,Built-in Microphone Pill Car Outdoors Speaker Rose Color Size:7.68*1.97*1.97inches Material:Plastic Suitable for outdoor and indoor,outgoing, traveling, morning exercising, playing sports,dancing, afternoon tea, etc Power supply built-in lithium battery,power supply,or 5VMiniUSB built-in batter,no external pwer supply can enjoy music for long time;ready Car etc.Stylish,portable and light weight designed; to refuel life Flexibility can be in car and office environments; Compliant with the Bluetooth 2.1 standard,high date transfer rates,and with excellent anti-jamming capability. High sensitivity,fast coonection to Bluetooth devices within operating range Support phone call function,supports conference calla-via Bluetooth phones,the available speaker directly answer the phone.