1.Standards: bluetooth specification v2.0/v2.1+edr 2.Radio frequency range: 2402-2480mh 3.Transmission power:bluetooth power class 2 4.Receiver sensitity:-80dbm(per 1%) 5.Distance:10m in open space 6.Battery life: standby time up to 110h Talk time:up to 5h Charging time:lower 3h 7.Button/switch:multi-function button, volume up/down 8.Weight:5g 10.Operation temp&hunidity temperature:-10-50c, humidity 095% 11.Certification:bqb, ce, fcc, rohs, msds of battery Bluetooth headset device, charger, ear hook, ear line, english user manual.Packing terms:paper box, crystal box, iron box or flexible.