Kid-Friendly Design: Comfortable with durable, oversized controls ideal for small hands. Long Battery Life: Up to 50 hours (with ANC off). Built-In Mic: Enables easy communication with family, friends, or teachers. Personalization: Comes with a JBL sticker set for a fun, customizable look. General Driver size : 32 mm/1.26" Dynamic Driver Power supply: 5.0 V 1.0 A Maximum operation temperature: 45 °C Audio Sensitivity : 83 dB SPL 1 kHz Frequency response (Passive): 20 Hz - 20 kHz Frequency response (Active) : 20 Hz - 20 kHz Impedance : 35 ohm Maximum SPL : 82 dB Microphone sensitivity : -37 dBFS/Pa 1 kHz Dimensions: Weight : 196 g/ 0.432 lbs Ear cushion outer length (mm) : 89.1 Headphone width (mm) : 76 Ear cushion height (mm) : 23.1 Ear cushion inner length (mm) : 55 Ear cushion inner width (mm) : 37.9 Charging cable length : 20cm AUX cable length : 120cm Control And Connection Bluetooth version : 5.3 Bluetooth profile : A2DP V1.4, AVRCP V1.6.2, HFP V1.8 Bluetooth transmitter frequency range: 2.4 GHz – 2.4835 GHz Bluetooth transmitter power : (EIRP) Bluetooth transmitter modulation: GFSK, π/4 DQPSK, 8DPSK Supported formats: .MP3, .WAV, .WMA, .FLAC Battery Battery type : Lithium-ion battery (500 mAh / 3.7 V) Charging time: < 2 hrs from empty Music playtime with BT on and ANC off : Up to 50 hrs Music playtime with BT on and ANC on: Up to 28 hrs Talk time with ANC off: Up to 29 hrs Talk time with ANC on: Up to 20 hrs What's In The Box 1 x JBL JR 470NC headphones 1 x 3.5mm audio cable 1 x USB Type-C charging cable 1 x sticker sheet Safe Sound Levels: Limits output to 85dB to protect young ears. Active Noise Cancelling: Blocks external noise so kids don't need to increase volume. Customizable Controls: Use the JBL Headphones app to set max volume and daily listening time, with reports on listening activity. 12 months Local Manufacturer Warranty Store in a cool dry place. China