Ultimate Ears 984-001402. Passive radiator size (W x D): 2.17 x 3.39" (55 x 86 mm), Driver diameter: 2" (5.08 cm). Frequency range: 60 - 20000 Hz, Sensitivity: 90 dB. Connectivity technology: Wireless, Bluetooth profiles: A2DP, Bluetooth range: 1771.7" (45 m). Product type: Stereo portable speaker, Product color: Black, Product design: Cylinder. Recommended usage: Universal, Mobile operating systems supported: iOS, Android