Features: 1. The Bone Conduction Concept wireless headset has a built-in 150mah large battery, providing you with battery life anytime and anywhere. 2. Intelligent active noise reduction to reduce surrounding noise and make calls clearer. Every time the Bluetooth-compatible headset is connected to the mobile phone, the Bluetooth-compatible headset will automatically connect to the mobile phone after it is turned on, which is convenient and fast. 3. Support all mobile phones, tablet and notebook devices with bluetooth-compatible compatible functions. You can connect to Bluetooth-compatible compatible devices at the same time, switch listening to songs, games, and calls at any time. 4. Strictly waterproof, prevent sweat and dust from corroding components, high-quality call listening experience, long battery life, not afraid of running out of electricity, bone conduction concept car hands-free business headset with microphone. 5.After-sale Service: If you have any questions, please contact us immediately and we will help you solve it as soon as possible. Specifications: Product model: k69 bone conduction concept wireless bluetooth-compatible headset Style: Bone conduction concept Color: black green pink Bluetooth-compatible version: 5.1 Transmission distance: 10m Capacitor capacity: 150mah Use time: 8-10 hours Standby time: 180 days Charging time: 1-2 hours Speaker resistance: approx. 16mm/0.63" 32 Sensitivity: -42dB Working temperature: -10-50 includes: 1 *Bone Conduction Earphone