Note:
1.Please keep the headset in dry and cool environment as the earmuff is made of memory-protein materials. 
2. The headset needs to be fully charge before first-time use. 
3. If you can't connect this headphones to your cell phones or other devices,  please ask us for a complete FAQ guidance of Bluetooth Headphones, you can find the solutions finally! 

Specification:
Bluetooth Version: V5.0
Range: 33 feet (10 meters)
Talking Time: Around 15 hours
Playback Time: Around 13 hours
Charging Time: 4 hours
Charging Voltage: 5V
Battery Capacity: 420mAh

Packing List
1x Riwbox Bluetooth Headset
1x 3.5mm Audio Cable
1x USB Charging Cable
1x User Manual
IMPRESSIVE SOUND QUALITY: Riwbox XBT-880 is a bluetooth headphone features with a 40mm large diameter aperture drivers and bulit-in high detail microphone. Wide frequency range reproduces precise deep base and high clarity sound. You can expect comfortable listening experience for both music playing or phone calls.
OVER-EAR PADS: The ear cushion is made with protein, high soft elasticity, keep your skin feeling soft when it cover ears, comfortable and breathable, very suit for a long time wearing.
HANDS-FREE CALL & BUILT-IN MIC: Please Note: Headphones with Microphone and volume control works both in wireless /wired mode. Riwbox Bluetooth headphones provide a quick and stable connection with your Bluetooth enabled devices like cell phones, tablets, pc, TVs within 33 feet, with a high-quality built-in microphone for hands-free calls.
Lightweight Stylish Design: Fashion design with reflective metal collocation, gives a luxurious premium feel to the headphones as well as being strong and robust to look great for many years. Foldable headphone for easy storage.