Specification: Model Number: QK-03 Optional Color: Black, White, Pink Earphone Size: 40*7*5mm Storage Box Size: 48*45*23mm Earphone Weight: 23g each one Storage Box Weight: 65g Earphone Battery Capacity: 45mAh Storage Box Battery Capacity: 450mAh Charging Time: 30min bluetooth Version: 4.1 Speaker: φ10mm *2 Hi-Fi stereo bluetooth Transmission Distance: 10m Earphone Working Time: 120min/0.09Wh Frequency: 2402MHz-2480MHz Voltage: 3.7V Impedance: 32Ω Earphone Output Power: 0.09W Features: 1. bluetooth 4.1 version, the effective distance up to 10m, it could build faster connection and transmit stable signal in high speed. 2. Come with an 450mAh intelligent charger box, it is a storage box as well as a charger. Put the earphone in it and close the lid, it would charge the earphone automatically. 3. Dual bluetooth earbuds, the right one is the main earphone, they would turn into double channel stereo mode when connect with the phone. You could use it in single or together. 4. Intelligent voice prompt, it could indicate you the real-time state of the earphone, such as low battery, successful connection, power on or off and etc. 5. Lightweight, mini size, you will feel comfortable in ears. 6. Strong compatibility, it could compatible with most of bluetooth devices. Besides, this earphone support simultaneous connection with two bluetooth devices. Package Included: 1 x Truly Wireless Earbuds(A pair) 1 x USB Charging Cable 1 x Storage Charging Box 1 x User Manual Ships in 7 business days. It is shipped from China. Delivery is provided by China Post Air Mail. Delivery time depends on the couriers, local customs in your country also holidays, weather conditions. Usually it takes from 39 to 60 days, depending on the customs at your country.