VIVANCO BLUETOOTH SMART TV HEADPHONES 2 in 1 black

* 2 in 1 Bluetooth Over Ear Headphones * Alternatively wireless or wired entertainment * With telephone function * Works with smart TV * Fully foldable design * Built-in lithium polymer battery with 250mAH * Charge- and audio-cable included * Bluetooth chipset: CSR8635, version 4.0 * Bluetooth profiles: HSP, HFP, A2DP and AVRCP * Battery: Lithium battery 250 mAH * Music Playing time: up to 10 hours (mid volume) * Charging Time: 3 hours * Driver unit: 40mm neodymium * Sensitivity: 98db+-3db * Microphone Sensitivity: -58db * Support 3.5mm audio in * Support battery indication