ZVUČNIK XO F21 BLUETOOTH Bluetooth: V5.0, Transmission distance: 10meters, A2DP, HSP, HFP, Wireless frequency: 2.402 2.480GHz, S/N: 90db, Microphone, Battery Capacity 300mAh, Music time: About 2.5hrs, Charging time: 2hrs, Charging Input Standard: DC5 Micro USB, Product Dimension: 100x100x50mm, Weight 126g, Color: Green 20777.