BK8000L SPP Bluetooth Speaker Amplifier Board Description: Bluetooth specification Bluetooth V2., 1 Supply voltage DC2., 8-4., 2V, ≤2., 9V automatic shutdown, ≤3., 1V alarm Bluetooth protocol HFPV1., 5, A2DPV1., 2, AVRCPV1., 4, HSP1., 2, GAVDP1., 2, IOP Working current ≤60mA Standby current Temperature range -40oC ~ + 85oC Wireless transmission range ≤10 meters Transmission power Class2 4dbm Sensitivity -80dBm Frequency Range 2., 4GHz ~ 2., 480GHz External Interface Serial (TTL), connected to the PC need MAX232 SBC decoding audio performance Module size 25x13., 5x1., 8mm Adapter plate size 31x25mm Package included: 2* BK8000L Wireless Bluetooth Stereo Audio Module Speaker Pc 3 Pcs BK8000L Sem Fio Bluetooth Transmissão Módulo De Áudio Estéreo AT Comandos Kit Bluetooth V2.1 SPP TTL External Interface Serial (TTL), connected to the PC need MAX232 Buy it with This item: HiLetgo 2 x BK8000L Wireless Bluetooth Stereo Audio Module Transmission at Commands SPP Bluetooth Speaker Amplifier DIY €1399 Get it as soon as