JBL Charge 4 - 20hrs Playtime, IPX7

Bluetooth version: 4.2 * support: a2dp v1.3, avrcp v1.6 * transducer: 50 x 90mm * rated power: 30w rms * frequency response: 60hz-20khz * signal-to-noise ratio: >80db * battery type: lithium-ion polymer 27wh (equivalent to 3.6v, 7500mah) * battery charge time: 4 hours (5v/2.3a) * music playtime: up to 20 hours (varies by volume level and audio content) * usb charge out: 5v/2a (maximum) * bluetooth transmitter power: 0-20dbm * bluetooth transmitter frequency range: 2.402 - 2.480ghz * bluetooth transmitter modulation: gfsk, π/4 dqpsk, 8dpsk * dimension (w × d × h): 220 x 95 x 93mm * weight: 965g