Ultimate Ears WONDERBOOM 藍牙喇叭【總值HK$ 849】 Ultimate Ears WONDERBOOM Bluetooth Speaker Black【Total Value HK$ 849】‧ The discount offer is valid from 7 May 2019 to 15 May 2019.‧ The offer and giveaways only apply to Hong Kong Broadband Network(HKBN) corporate staff.