Bluetooth Earphones Headworn Noise Reduction Foldable Card Insertion Gift Game Wireless Earphone Features: You can also listen to music by inserting a card: it can be inserted into a 32G internal card and is MP3 format. Powerful and shocking: Qintie boron unit upgrade/shocking. 10 meter Bluetooth stable transmission: lossless Bluetooth transmission/nearly 100 meters transmission distance. Long lasting battery life: 400 milliampere high capacity lithium battery, continuous playback for about 4-6 hours. Supports wired mode: supports AUX audio input and can still be used power outage. Portable folding: The portable folding makes it easy to include in the bag. Product Description: USB charging: DC5VIN Signal to noise: 88Db Bluetooth distance: 10 meters Output power: 35mW Charging time: 2 hours Call duration: 6 hours Standby time: 18 hours Material:Plastic Size:11x17x7cm Package Included: 1× Bluetooth earphones, 1 × Charging cable, 1 × Audio cable, 1 × instructions