Wing 2 Wireless Sport Headphones. Specifications: General: - Measurements: 102.5 x 126.5 x 46.5mm/4.04 x 4.98 x 1.83´´ - Weight: 35g/1.23oz - Case material: Silicone + Titanium Alloy - What´s in the box: Suunto Wing 2 headphones, charging cable, Powerbank, Suunto storage bag, Printed user quick guide, International warranty leaflet, Safety leaflet - Firmware upgradable: Yes - Water resistance: IP67 - Battery type: Rechargeable lithium-ion - NFC pairing: Yes - Dual microphone + noise cancellation: Yes - Offline music storage: Yes - Battery capacity: 170mAh - Battery charge time: ´´Headphones:≤1h - Powerbank:≤1.5h´´ - Music only play time: ≧10H, Used with powerbank: ≧30H (60% volume, using SBC format to play ´Hotel Californi´) - Storage bag included: Yes Features: - Battery life: 12h - Swim log tracking: No - Swim technique parameters: No - Offline music: No - Offline music file formats: Yes - Configurable LED lights: Yes - Head posture assessment: No - Head motion controls: Yes - Powerbank included: Yes - Anti-wind noise: 30km/h - Sound modes: Normal, Outdoor - Safety lights: Yes - Motion based training functions: Yes - SuuntoPlus voice guidance: Yes Physical Specifications: - Operating temperature: -20° C to +60° C / -5° F to +140° F - Storage temperature: -20° C to +60° C / -5° F to +140° F - Recommended charging temperature: 0° C to +45° C / +32° F to +113° F Connectivity: - Smartphone compatibility: Most common models supported - Compatible with Suunto app: Yes - Software updates from cloud: Yes - Bluetooth: 5.3 - Bluetooth range: > 10m - Supported audio formats: A2DP, AVRCP, HFP, HSP - Supported audio codec: SBC, APTX Adaptive - Dual device connection: Yes Speaker: - Size: L24.2mm x W15.1mm x H6.2mm - Impedance: 6Ω±15% - Frequency range: 20Hz~20kHz - Sensitivity: 117dB@1kHz -10dBFS - T.H.D: