What’s in the box: 1 x JBL Wave 300TWS headphones 1 x Charging case 1 x USB Type-C charging cable 1 x Warranty/Warning (W/!) 1 x QSG/Safety Sheet (S/i) Technical specifications: Driver size: 12mm/0.47" Dynamic Driver Power supply: 5V 1A Earbud: 3.85g per pc (7.7g combined)/ 0.009 lbs per pc (0.017 lbs combined) Charging case: 36g /0.079lbs Earbud battery type: Lithium-ion polymer (40mAh/3.85V) Charging case battery type: Lithium-ion polymer (500mAh/3.8 V) Charging time: <2 hrs from empty Music playtime with BT on: up to 6 hrs Frequency response: 20Hz – 20kHz Impedance: 32 ohm Sensitivity: 105dB SPL@1kHz Maximum SPL: 95dB Microphone sensitivity: -38±2 dBV/Pa@1kHz Bluetooth version: 5.2 Bluetooth profile version: A2DP V1.3, AVRCP V1.6, HFP V1.7 Bluetooth transmitter frequency range: 2.4GHz – 2.4835GHz Bluetooth transmitter power: <12dBm Bluetooth transmitter modulation: GFSK, π/4-DQPSK, 8-DPSK Maximum operation temperature: 45 °C