JBL Charge 5. RMS rated power 40 W. Frequency range 60 - 20000 Hz. Connectivity technology Wireless. Frequency range 2.4 - 2.4835 GHz. Bluetooth transmitter modulation 8DPSK. DQPSK. GFSK. Product type Stereo portable speaker. Product colour Black. Product design Tube. Recommended usage Mobile phone / Smartphone. Battery type Built-in battery. Battery life (max) 20 h. Battery recharge time 4 h