D02 Pro Wireless Bluetooth Headphones 40mm full range audio unit 50 Hours of battery life 10 Meters of stable transmission 304 Telescopic rods , solid and durable For different groups of people One-for-two smart design Portable and folding 40mm Moving Coils for Immersive Listening Wireless 5.3, 10m Stable Connection Charge Once and Listen for a Week Dual Use , Calling while Playing Smart connection technology supports connecting two devices at the same time. Reinforced Headband Durable and Anti-deformation Headset details Telescopic rods sliding adjustment Inner rotation fold adiustment Headphone headrotation adjustment Comfortable over-ear Headphones with noise isolation Lightweight and Folding Button description Power button 3. 5mm audio port Type-c charging Port Long press : last song Long press : reject / Siri Long press : next song Single click: volume- Single click: anser/hang up Single click: volume+ Wired or Wireless Easy to Switch Powerful Compatibility for Boundless Music Product parameter