Ultimate Ears WONDERBOOM 2 - Radical Red
Maximum sound level: 86 dBC (standard mode) and 87 dBC (OUTDOOR BOOST mode)
Frequency range: 75 Hz – 20 kHz
Drivers: two 40 mm active drivers and two 46.1 mm x 65.2 mm passive radiators.
Rechargeable lithium-ion battery for up to 13 hours of battery life between micro-USB charges.
Charge time: 2.6 hours (with BC1.2 compliant adapter)
Connect up to 2 source devices simultaneously, wirelessly play (stream) music from either one. Wirelessly play (stream) to 2 WONDERBOOMs from one source. Mobile range - 100 ft
For audio playback: smartphones, tablets, and other devices that support Bluetooth® [Advanced Audio Distribution Profile (A2DP)]