Style meets sound JBL Soundgear Frames are the perfect fusion of sound and fashion. Made with the latest thermoplastic materials, the slim, flexible, lightweight frames are comfortable enough to wear all day, and come in an unique translucent color and stylish design. (And yes, you can get prescription lenses installed in them by your optician.) Open the temples to turn the speakers on and close them to turn them off. When you're wearing them, just tap the JBL logo on either temple to adjust the volume, answer a call, or skip a song. JBL's unique ultra-thin 25mm*9mm high amplitude speakers—powered by JBL OpenSound technology—are mounted inside the slim temples to enhance aesthetics and comfort. They deliver an immersive and engaging audio experience while still letting you hear the sounds around you. Connect the Soundgear Frames to the JBL Headphones app and customize the sound to your own preferences, or choose from 6 preset EQ curves. The JBL Soundgear Frames are where style meets sound. General Specifications Power supply 5 V ⎓ 0.5 A *2 Material Frame-Plastic (TR90), Hinge-metal (SUS316), Temple housing- Plastic (PC) IPX rate IP54 Audio Specifications Driver size 25mm x 9 mm/0.98" x 0.35" Dynamic Driver Frequency response 100 Hz - 18 kHz Impedance 20 ohm Sensitivity 114 dB SPL@1 kHz Maximum SPL 90 dB Microphone sensitivity -38 dBV/Pa@1 kHz Maximum operation temperature 45 °C Dimensions Battery type Lithium-ion battery (110 mAh/ 3.8 V) Charging time 2 hrs from empty Control and Connection Specifications Bluetooth version 5.2 Bluetooth transmitter frequency range 2.4 GHz – 2.4835 GHz Bluetooth transmitter power <12 dBm (EIRP) Bluetooth transmitter modulation GFSK, π/4-DQPSK, 8DPSK Dimensions Round shape (L x W x H) 160.87mm * 150.54mm * 53.68mm / 6.33" 5.93" 2.11" Dimensions Square shape (L x W x H) 160.21 mm x 152.54 mm x 50.83 mm/6.31" x 6.01" x 2.00" Battery Battery type Lithium-ion battery (110 mAh/ 3.8 V) Charging time 2 hrs from empty Features JBL Headphone App Yes