utral long Range up to 2Km small size,Cheap Price,easy to handle Used in Sports Stadium,Shopping Mall,wide spaces with crowds  

Industrial strength aluminum casesmall size: 83mm x 65mm x 23mmcase mounting flangesmagnetic bottomIndustrial operating temperature range -40ºC 85ºC Power supplyPowered through USB, 5V, max 200mA Bluetooth with externalantenna connectoromni-directional antenna up to 2km with 9dBidirectional antenna up to 10km with 18dBiprofessional installation up to 30km with 24dBi parabolexternal cable available CertificationsBluetooth certified (BQB)Bluetooth 2.0 compatible with 802.11b tolerance (AFH) FCC authorization 15CCE certification raw output power: 19.5dBminput sensitivity: -92dBmomni directional antennas: up to 9dBidirectional: up to 18dBiprofessional installation up to 24dBiantenna connector: RP-SMA

dongle bluetooth long range 2km