Product name: wireless Bluetooth headset <b><p>Support for most Bluetooth devices, just connect directly to Bluetooth, no application download required. <b><p>Built in lithium battery, support charging and playing.do not worry about running out of batteries. <b><p>Support system: mobile phone/tablet PC/TV/TF/FM/computer <b><p>Bluetooth Version 5.0 <b><p>Wireless Bluetooth Distance: recommendation ten meters <b><p>Transmitting Power: Class 2 <b><p>Horn: diameter 40mm <b><p>Impedance: 30Ω <b><p>Support TF Card Capacity: 128M-32G <b><p>Radio Frequency Range: 87.5-108MHz <b><p>Listening Time: 10 hours <b><p>Phone Call Duration: 10 hours <b><p>Full charge Time: 2 hours <b><p>Charging Voltage: 500mah (continuous use for 10 hours) <b><p>Charging Voltage: 5V≤300MAH <b><p>Working Power Supply: 3.7V lithium ion battery <b><p>Working Current: ≤30mA <b><p>Color Box Size: 175*158*88mm <b><p>Open Dimensions: 195*172*85*mm <b><p>Folding Size: 170*120*85mm <b><p>Net Weight: 340g (11 OZ) <b><p>What is include: <b><p>A 3.5mm Audio Cable <b><p>One USB cable <b><p>A user manual