• The newly upgraded polymer composite diaphragm dynamic speaker enjoys detailed tones & HiFi sound quality
• Built-in MEMIS microphone lets you enjoy crystal-clear calls. The built-in mic effectively reduces ambient noise & picks up human voice, allowing you to enjoy HD calls even in a noisy environment
• Exclusive custom BT 5.1 chip is lower power consumption faster & more stable connection
• Audio Sync with Picture Minimized Latency. Stable connection without jamming low-latency transmission, immersive gaming experience 
• Half-in-ear design exceptional comfort. Mini & exquisite, secure fit for all-day comfort

Specifications:

• Model: JR-T03S Air
• Bluetooth version: V5.1
• Protocol support: HSP/HFP/A2DP/AVRCP
• Audio decoding: AAC/SBC
• Communication range: ≤15m (standard environment)
• Frequency response: 20Hz-20KHz 
• Driver unit: φ13mm
• Impedance: 32Ω  
• Power: 3mW
• Battery capacity of charging case: 400mAh 
• Headphone battery capacity: 30mAh 
• Music time: about 5 hours (volume 80%) 
• Talk time: about 4h
• Connected standby time: about 48h 
• Charging time: about 1h
• Wireless charging time: about 3h
• Chargeable for headphones: 4 times
• Charging input: DC 5V/1A
• Charging case size: 44 x 22 x 53.8mm 
• Product net weight: 48g±2g