Wireless Earbuds,Bluetooth 5.1 Headphones With Charging Case, Bluetooth Headphones with Mics, In-ear Detection, Volume Control, For Sports/Working Feature: Bluetooth 5.1 Technology- The Bluetooth headset uses the latest Bluetooth 5.1 chip. Stable data transmission and wide wireless coverage. Compatible with all Bluetooth enabled devices. Great for Gifts. Bluetooth headphones with 300mAh battery capacity charging case,The 300 charging box is portable to go out. It is to store the charging box, which is convenient and practical. There is no need to worry about losing the headset because it has no-where to store it. Hi-fi Stereo Sound Quality: Bluetooth earbuds use the latest technology in speakers and with its special construction, both headphones can produce clear and quality stereo sound. You can use in gym, office, or outside. Even in a noisy environment, you can enjoy music anytime, anywhere. button control & Auto on/connect, The multifunction button or microphone on each Bluetooth headset can easily manage audio playback or calls. Just tou-ch your earplug to songs, start music and answe-r the phone, so you don't need your device to adjust the music. Ergonomic design secure Fit: The in-ear sport earbuds Bluetooth wireless with ergonomic design and the-sized ear tips, comfortable fit for your ears no matter you're at the gym, exercising, running, jogging. Product parameters: Bluetooth Name: L52 x IC model: Jerry 6973d4 Support protocol: SPP/A2DP/AVRCP/GAVDP/HID/AVDTP/AVCTP/IOP/HFP Bluetooth usage frequency: 2.402g-2.408g Battery type: polymer battery Signal to noise ratio: 90dB Sensitivity: 90.5db Transmissio-n distance: more than 10 meters Control mode: tou-ch Audio range: 20Hz-20KHZ Channel: true stereo (TWS) Distortion: less than 1% Earphone battery capacity and model: 40mah/401009 Battery capacity and model of charging chamber: 300mah/602030 Playback time: 6 hours Headset charging time: 1 hour Charging of charging chamber: 1 hour Horn specification: φ 1032 Ω (real copper ring) Packing size:3.93x3.93x1.37inch Gross weight:0.23lb The Package Include: 1x Headset 1x Manual 1x Data cable