Bluetooth: Version 5.3 with JL AC7006 chip Battery Capacity: 800mAh; full charge in approx. 2.5 hours Battery Life: Up to 120 hours of continuous use; 1200 hours standby Design Weight: Headset length 96 cm; total weight 50 g Playback Options: Supports Bluetooth connection and TF card playback (up to 32 GB) Voice Prompts: Chinese and English prompt tones available; activate by double-clicking the multi-function button when unpaired Key Feature: Large 800mAh battery delivers ultra-long 120-hour usage with fast 2.5-hour recharge time