Description: Connection: Children use, is very important, the latest Bluetooth-compatible5.0 signal, the transmission link is faster and more stable. Long Battery Life: Long battery life, 12 hours battery life, sturdy and durable. Folding Storage: Detachable cat ears, flexible telescopic adjustment, suitable for a variety of different head shapes. Volume Limit: The volume limit technology strictly controls the volume standard, and the built-in volume limiter does not exceed 85 decibels. Color Options: Pink, purple, blue, green, four color options to meet different needs. Specification: Material: ABS Color: pink, purple, blue, green Type:1 (wired version) 2(Bluetooth-compatible version) Bluetooth-compatible scheme: 5.1 (Bluetooth-compatible system compatible with Bluetooth-compatible 2.1/2.0/1.2) Bluetooth-compatible frequency: 2.401-2.480GHz Bluetooth-compatible distance: 10 meters Frequency response: 50HZ-20KHz Output power: 35mW Signal to noise ratio: 85Db Charging time: 2.5 hours Frequency range: 20KHz-20000KHz Sensitivity: 90dB/mW Impedance value: 320 Drive unit: 40mm Life time: 20 hours Standby time: 300 hours Transmission distance: 10 meters Power by: 400mA battery (battery included) Transmitting frequency: 2402MHz-2480MHz Size: about 19*8*21 cm/7.48*3.15*8.27 inch(L*W*H) package: 1 pc * headphone 1 pc * Chinese and English manual 1 pc * audio cable 1 pc * charging cable Note: 1. Due to the light and screen difference, the item's color may be slightly different from the pictures. 2. Please allow 0.5-2 cm differences due to manual measurement.