Has the function: [1] Large factory OEM, professional, quality assurance [2] Bluetooth 4.1 low power consumption [3] Listening to the song talk time: 10-12 hours, standby time: 240 hours or so [4] Using noise reduction and echo suppression technology, the sound quality of any noisy environment is still excellent [5] Compatibility: Strong compatibility, digital products with Bluetooth function on the market can basically be used; [6] Lithium-ion battery: 120mAh, working time: 20 days [7] Color: black, red, blue [8] OEM custom can undertake ODM, customize LOGO according to your needs [9] Support mode: HSPA2DPhfpAVRCP [10] The weight of the product is 8g. It is light and comfortable to wear. [11] Transmission distance 10 meters DSP intelligent noise reduction [12] Support one for two language prompts Chinese and English voice