The Z2PRO-S delivers a robust 76Ws output and features an efficient cooling system that allows for up to 100 continuous full power flashes without overheating. Its advanced quartz tube supports up to 100,000 flashes. The flash head enhances its color temperature, ensuring realistic color reproduction, and swivels 330, and tilts -7 to 120 for flexible bouncing. Two 2W 3300K LED modeling lamps provide 10 brightness levels (01-10). This speedlight has an upgraded UI and a TCM key that switches from TTL to M mode in a second. This external flash speed light features automatic metering, 1/1-1/256 manual dimming, 28-105mm length, stroboscopic flashes, 1/8000s HSS, front/rear curtain sync, FEC/ (flash exposure compensation/bracketing), S1/S2 optical slave modes, and other functions. Firmware update is available via the USB Type C port. This speedlite flash features a built in 2.4G wireless Q system with four control groups (M/A/), 32 channels, and 99 with QPRO-S TTL transmitters (not included). It operates as a master/slave unit for Q system flashes up to 328ft/100m. Also compatible with for 2.4G X system via the RX COMPAT menu and as a slave compatible with X3 X2 transmitters and other X system master lights. Note: Q and X systems cannot be used simultaneously. The 7.2V/3000mAh lithium battery provides 600 full power flashes, 1.5s fast recycling time, and a 1/180-1/20000s flash duration. The battery is equipped with a Type C port for external charging, and can be in 2.5 hours using a 5V 2A USB charger (not included). Model:Z2PRO-S Item Type:Speedlite Flash Application:Photography/Portrait Main Features: 3000mAh Lithium Battery Mounting Points: Hot shoe (The product printed words depending on the batch, but this does not affect use) Specification:for Color:As Shown Material:ABS Package Contents: 1set * flash accessories Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.