Description: Simple and easily control, free your handsHigh quality TPE cord with thousands of times of test, durable. Bluetooth 4.0, Compatible with a variety of Bluetooth smartphones on the market. According to , the chemical point of the ear. As custom ft your ears, privacy is good, leaving the car does not affect the call in progress. CVC 6.0 intelligent noise reduction with HD talking. Intelligent voice prompt - Caller's ID number prompt when the call is coming. Multipoint - One headset can connect 2 mobile phones simultaneously. Specification: Product Name: Bluetooth headset Model: F920 Chip: CSR 8615 Distance: 10m Version: 4.0 Charging voltage: 5V Transmit power: Class 2 (-6dbm-4dbm) Working voltage: 3.7V Working frequency: 2.402-2.480Ghz Battery Specifications: Rechargeable Polymer Lithium Battery (601515/ 80MAH) Size: 55mm*27mm*15mm Weight 18.5g Speaker impedance: 16 15% Sensitivity: 95 +-3DB Frequency range: 50-20KHZ Rated output power: 3mW Maximum output power: 5mW Speaker size: 10X4mm Microphone size: 4X1.5mm Microphone sensitivity:-42 +/-3db Charging time: about 2 hours Low power shutdown voltage: about 3.2V Music time: about 4 hours Talking time: about 5 hours Standby time: about 80 hours Package Includes: 1 x Fineblue F920 Earphone Note: Please allow slightly 0-1cm difference due to manual measurement. Colors can appear different depending on light and how the listing is viewed. Thanks for your understanding and attention. Wish you a pleasant shopping experience!