Specification:
💡Name: Sennhei CX SPORT in-ear headphones
💡 Wearing style: On-ear
💡 Bluetooth version: 4.2 
💡 Profile support: A2DP 1.2, AVRCP 1.4, HSP 1.2, HFP 1.6 - HD Voice (or higher)
💡 Frequency Response: 17 - 21,000 Hz
💡 Maximum SPL : 112 dB (1 kHz/0 dBFS)
💡 THD, Total Harmonic Distortion <0.5 per cent
💡 Ear coupling: In-ear
💡 Transducer principle: Dynamic 
💡 Weight: 15.07 g
💡 Audio input: Bluetooth
💡 Range: 10 metres 
💡 Pickup Mode: Omni-directional
💡 Operating Voltage: 3.0-4.2V
💡 Battery Specifications: Built-in rechargeable lithium-ion polymer battery
💡 Individual ear cushions: S, M, L (4 sets)
💡 Audio Codec: apt-X / apt-X LL / AAC / SBC

Package Includes:  
📦CX SPORT in-ear wireless headphones
📦 USB charging cable
📦 Headphone adapter set (S / M / L)
📦 Over-ear adapter set (2 sets)
📦 Cable Clip
📦 Neoprene Storage Pouch
📦 Quick Guide + User Manual
📦 In Original Box