Brand UTEL Model H52 Quantity 1 Color Black + white Bluetooth Version V3.0 Ear Coupling Earbud Talk Time 3.5 Hour Standby Time 85 Hour Operating Range 10 meter Compatibility V2.1 / V2.0 / V1.1 Microphone Yes Supports Music Format MP3 Power Supply Built-in Battery Built-in Battery Capacity 50mAh Compatible With Iphone / Sony / HTC / Nokia etc. Other Features Bluetooth V3.0 quickly match clear sound and energy-saving; Comfortable to wear; Supports connect to 2 devices; The last number redial; Voice dial; Voice and flash alarm as low voltage; Chipset: SCR single chip; Working frequency: 2402MHz~2481MHz; Transmission power: Class 2 (maximum 5dBm); Receiving sensitivity: -80dBm; Battery: 3.7V 50mAh rechargeable high molecular polymer lithium battery; charging input voltage: DC 5V; Continuous talking time: 4 hours; Standby time: 100 hours Packing List 1 x Bluetooth earphone 1 x USB charging cable (80cm)1 x Scrap (35cm)1 x Earbud1 x Ear-hook 1 x Chinese user manual