5.3 Bluetooth Headset With Retractable HiFi Subwoofer, Fully Enclosed Ear, And Wireable Card Insert Product parameters: Product name: Bluetooth headset Function usage: wireless headset, Bluetooth headset, sports headset Bluetooth version: 5.3 + EDR Color: Black Battery capacity: 400mah Horn: 40 mm/32 Ω Receiving sensitivity: - 84dBm Transmission power: Max 6dBm Transmission range: ≤ 10M Plug in card playing: supports playing songs in the external card Charging: USB charging interface Charging time: about 2 hours Call duration: ≤ 6 hours Standby time: 200 hours Product size: 18.8x8.6x6.7 cm/ 7.40x3.38x2.64 inch Package size:20.0x14.4x7.9 cm/ 7.94x5.87x3.11 inch Gross weight: 243 g/ 0.536 lb Feature: mode wired and wireless. Intelligent Bluetooth stereo multifunctional earphone, one click connection, real sound, wired and wireless connection. This is a wireless earphone with wired connection function, so you can use and it according to your needs. Comfortable all day, made of headband, making it easy to wear various sizes of heads without pain. The softer and more comfortable memory protein earmuffs defend your ears during long use. 5.3 Wireless Bluetooth with automatic connection function. You can use the buttons on the headphones to play, pause, control volume, and other basic operations. When connected to a mobile phone to listen to music or a phone call, the wireless transmission signal is stable and the sound quality is excellent. Long standby. Polymer safe explosion proof battery, which can be continuously used without worrying about the battery's short lifespan. Mini headphones. Support stretching structure adjustment, which can adjust the ears, making individuals more comfortable and suitable for different types. The Package Include: 1 x Bluetooth headest 1 x Charge cable 1 x Use manual