Model X300 Quantity 1 Color Deep grey + black Bluetooth Version V3.0 + EDR Operating Range 10 meter Compatibility V3.0 / V2.1 / V2.0 Microphone No Radio N/A Supports Music Format MP3 Power Supply US plug AC 100~240V / 1.5A Built-in Battery Capacity 320mAh Other Features Standby time: 330 hours; Music playing time: 10 hours; It can use as charging; Supports connect to amplifier via RCA cable; 180 degree rotation antenna; Frequency response: 20Hz~20000Hz; Working voltage: 3.7V; Charging time: 2 hours; Interfaces: 1 x mini USB / 1 x 3.5mm audio jack / 1 x DC charging port Packing List 1 x Bluetooth dongle 1 x AC power charger adapter (US plug / AC 100~240V) 1 x USB cable (80cm) 1 x RCA male to 2-RCA male cable (120cm) 1 x Chinese / English user manual