Specification: Type: Wireless Bluetooth Headphone Bluetooth: Version 2.1, Compatible with V2.1 And V1.1 Standard Chip: CRS BC6 Compatible with Bluetooth Function: Headphone Profile, Hands-Free Profile Transmission Frequency: Class 2 Applicable Models: Compatible with PS3 Game Machine and Bluetooth Mobile Phones of Main Brand Distance: 10m Frequency: 2402 Mhz-24802402mhz Ism Band Microphone Sensitivity: -45Db (0db V / Pa = 1.1khz) Product Weight: 45g Battery Type: Built-In Rechargeable Lithium Battery Battery Capacity: 180mAh Talk Time: 13hrs Standby Time: 220hrs Operating Voltage: 3.3-4.2V Charging Voltage: 5V Charging Current: 80mAh Charging Time: Less Than 2hrs Charger Power Supply: 110-240V Ambient Temperature: 15℃-25℃ Connection way: 1.Press the power button until the indicator light blinks alternately. 2.Search by mobile phone to find the Bluetooth. 3.According to the suggestion, enter the corresponding password "0000". Package Included: 2 x Headphones 1 x Earmuff 1 x User Manual 1 x Charging Cable