BS33 Voice wireless speaker BT V5.0 with 1200mAh battery for 5 hours of calls and music support BT, AUX, TF card, USB playback FM radio IPX51. Speaker: 52mm*2 4Ω5W*2 THD+N 10%.2. Sizes: 72×74.7×210.3mm.3. BT specification: BT V5.0 JL. Support protocol A2DP, AVRCP, HFP. Weight: 471g.4. Function: supp..