Annadue SX 991 Wireless Headphone

Specification: Item Type: BT Neckband Headphones Material: ABS Model: SX 991. BT version: 5.0. Supports BT protocol: HSP, HFP, A2DP, AVRCP. Transmission power: Class 2. BT distance: ≤ 10 m/32.8 feet. Charging time: ≤ 3.5 hours. Talk time: ≥ 18 hours. Music listening time: ≥ 16 hours. Standby time: ≥ 300 hours. Built-in battery: lithium ion battery. Battery capacity: 300 mAh. Package list: 1 x BT Neckband Headphones 1 x USB charging cable. 1 x pair of large ear plugs. 1 x pair of small ear plugs. 1 x storage bag. 1 x carabiner. 1 x English manual.