The Siemens OpenScape WL4 cordless IP phone supports VoIP and the SIP protocol, with the ability to use four lines. It connects via Wi-Fi according to IEEE 802.11 a/b/g/n/ac standards and features a 240 x 320 px color TFT display, Bluetooth, and a 3.5 mm jack. It supports caller ID and hands-free calling.

• Type: Cordless IP phone
• Color: Black
• SIP lines: 4
• Use: Multiple lines
• Display: Color TFT, 240 x 320 px
• Touchscreen: No
• Protocol: SIP
• Supported technology: VoIP
• Wi-Fi standards: IEEE 802.11 a/b/g/n/ac
• Connectivity: Wi-Fi, Bluetooth, 3.5 mm jack
• Features: Caller ID, hands-free calling
• Local phonebook: Up to 250 contacts
• Corporate phonebook: Up to 1,000 contacts
• Authentication methods: WPA-PSK, WPA2-PSK, EAP-TLS
• Water resistance: IP44
• Battery type: Lithium polymer
• Battery voltage: 3.7 V
• Battery capacity: 920 mAh
• Dimensions: 137 x 52 x 21 mm
• Weight: Approx. 135 g