40 mm, 32 ?, 500mAH, 24 h, 85±5 dB / 95±5 dBLOL Surprise! turquoise and pink wireless headphones are suitable for children aged 3 years upwards. These wireless kids headphones have with built-in microphone, also have two sound levels 85 dB and a louder setting for when you need a volume boost (such as travelling on aircraft or trains). These wireless headphones can be used with all your favourite devices (tablets, smart phones, handheld games, learning devices, gaming devices). May also be used in wired mode, using the 3.5 mm universal jack connector audio sharing cable (included). Note: all function buttons and mic are deactivated when the headphones are used in wired mode. All functions will only be available when the headphones are in used in wireless mode. Some devices may not be able to utilise some or all the functions, depending on the specifications of the devices itself. Please ensure that your Bluetooth enabled device system is up to date and using the latest software available.