What’s in the box: 1 pair of TUNE 125BT headphones 3 sizes of ear tips (S, M, L) Type C charging cable Warning card Warranty card Safety sheet QSG Technical specifications: Driver size: 8.6mm Dynamic frequency response range: 20Hz–20kHz Sensitivity: 96dB SPL/1mw Sensitivity: 96dB SPL1kHz Sensitivity: 96dB SPL/1m@1kHz dB v/pa: -21 Impedance: 16Ω Bluetooth transmitted power: 0~4dBm Bluetooth transmitted modulation: GFSK, DQPSK, 8-DPSK Bluetooth frequency: 2.402GHz–2.48GHz Bluetooth profiles: HFP v1.5, HSP v1.2, A2DP v1.2, AVRCP v1.5 Bluetooth version: V5.0 Battery type: GSP051230 01 Battery type: Polymer Li-ion Battery (3.7V, 120mAh) Charging time: <2hr Music play time with BT on: >16hr Talk time with BT on: >16hr Weight: 16.2g