Bluedio HS Wireless Neck-mounted Speaker with SD Card slot/FM

Bluedio HS Wireless Speakers Neckband with SD Card slot/FMSpecifications:Brand: Bluedio Bluetooth version: Bluetooth 5.0 Frequency range: 2.4GHz-2.48GHz Supporting protocols: A2DP、AVRCP、HSP、HFP Frequency response range: 20Hz-20KHz Music time in middle volume (fully charged): about 7 hours Standby time when play TF card music: about 65 hours Standby time after connecting devices: about 340 hours Standby time at speaker off status: about 17000 hours Speaker charging time: about 2.5 hours Speaker battery capacity: 650mAh Supporting Micro-SD card capacity: up to 32GB Decoding format: MP3, MAV FM frequency range: 87.5-108MHZ Input voltage/current: 5V/≥500mA Output power: 2×1.5W