Features: 100% brand new and high quality wireless Neckband headset battery is a 200 mAh high-capacity lithium battery. It can last about 8 hours of continuous talk/ 7 hours of music playback/ 2 hours charging time. The new 5.1 chip, the transmission is faster and more stable, the new generation of low-energy V5.1 chip, the connection is simpler and faster. 45-degree oblique in-ear style, stable and comfortable to wear, ergonomic design, fits the ear canal, isolates noise, and wears without pressure. Flexible neck hanging, can be bent arbitrarily, skin-friendly and elastic, comfortable to wear and convenient to store. Wearing earphones to play light music or audio books while sleeping can block outside noise and help you sleep better. Package Includes: 1x Neck Hanging Wireless Headset Specifications: Material: ABS Color: Black, White, Pink, Blue, Green, Light Blue (optional) Size:As the Picture Shown Wireless version: V5.1 Wireless range: 10m Speaker size: 10.0mm Impedance: 16 ohm Sensitivity: -423dB Frequency response: 20Hz-20KHz Battery capacity: 200mAh Charging port: Micro USB Charging time: 2 hours Output: 5V/0.5~ 1.0A Talk time: 8 hours Music playback: 7 hours note: Due to the lighting effects and shooting angles, there is color difference in the product, please understand. Due to manual measurement, there is a tolerance in the product size.