Bluetooth Headset Private Mode Mini Earplug Sleep $ 14.34 Specifications: Signal transmission channel: Cassl2 Wearing mode: Full in ear Rf transmission power: 90db Microphone sensitivity: 42db transmission range 10-15m transmission rate 24mbps talk time: 4-5 hours Listening time: 4-5 hours Input voltage: Dc5v-1a Standby time: 150 hours Headset battery: 35 ma The charging chamber battery is 350ma, which can charge the headset for more than 4-5 times Packing list: Charging chamber x1 bluetooth headset x2 data cable x1 u-shaped ear cap 1 pair